Add and Subtract Surd Expressions 2
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Question 1 of 4
1. Question
Simplify
`sqrt75 + 4sqrt12`
Correct
Great Work!
Incorrect
A radicand is the number under the square root symbol.
Terms with the same radicand are like terms. We can evaluate the coefficients of like terms.
Evaluate the coefficients of like terms (same radicand).`=` `sqrt75+4sqrt12` Find two multiples of 75 and 12 each where one is a perfect square. `=` `sqrt25 xx sqrt3+4sqrt4 xx sqrt3` Simplify `=` `5 xx sqrt3+4xx2 xx sqrt3` `=` `5 xx sqrt3+8 xx sqrt3` `=` `color(royalblue)(5)color(forestgreen)(sqrt3)+color(royalblue)(8)color(forestgreen)(sqrt3)` `=` `color(royalblue)((5+8))color(forestgreen)(sqrt3)` Evaluate coefficients `=` `13sqrt3` `13sqrt3` -
Question 2 of 4
2. Question
Simplify
`8sqrt28-2sqrt63`
Correct
Great Work!
Incorrect
A radicand is the number under the square root symbol.
Terms with the same radicand are like terms. We can evaluate the coefficients of like terms.Evaluate the coefficients of like terms (same radicand).`=` `8sqrt28-2 xx sqrt63` Find two multiples of 28 and for 63 where one is a perfect square. `=` `8 sqrt4 xx sqrt7-2 xx sqrt9 xx sqrt7` Simplify `=` `8 xx 2 xx sqrt7-2 xx 3 xx sqrt7` `4` and `9` are perfect squares `=` `color(royalblue)(16)color(forestgreen)(sqrt7)-color(royalblue)(6)color(forestgreen)(sqrt7)` `=` `color(royalblue)(16-6)color(forestgreen)(sqrt7)` Evaluate coefficients `=` `10sqrt7` `10sqrt7` -
Question 3 of 4
3. Question
Simplify
`3sqrt5+sqrt45-sqrt20`
Correct
Great Work!
Incorrect
A radicand is the number under the square root symbol.
Terms with the same radicand are like terms. We can evaluate the coefficients of like terms.Evaluate the coefficients of like terms (same radicand).`=` `3sqrt5+sqrt45-sqrt20` Find two multiples of 45 and 20 each where one is a perfect square. `=` `3sqrt5+sqrt9 xx sqrt5-sqrt4 xx sqrt5` Simplify `=` `3sqrt5+3sqrt5-2sqrt5` `9` and `4` are perfect squares `=` `color(royalblue)(3)color(forestgreen)(sqrt5)+color(royalblue)(3)color(forestgreen)(sqrt5)-color(royalblue)(2)color(forestgreen)(sqrt5)` `=` `color(royalblue)(3+3-2)color(forestgreen)(sqrt5)` Evaluate coefficients `=` `4sqrt5` `4sqrt5` -
Question 4 of 4
4. Question
Simplify
`6sqrt7-sqrt63+sqrt28`
Correct
Great Work!
Incorrect
A radicand is the number under the square root symbol.
Terms with the same radicand are like terms. We can evaluate the coefficients of like terms.Evaluate the coefficients of like terms (same radicand).`=` `6sqrt7-sqrt63+sqrt28` Find two multiples of 18 and for 32 where one is a perfect square. `=` `6sqrt7-sqrt9 xx sqrt7+sqrt4 xx sqrt7` Simplify `=` `6sqrt7-3sqrt7+2sqrt7` `9` and `4` are perfect squares `=` `color(royalblue)(6)color(forestgreen)(sqrt7)- color(royalblue)(3)color(forestgreen)(sqrt7)+color(royalblue)(2)color(forestgreen)(sqrt7)` `=` `color(royalblue)(6-3+2)color(forestgreen)(sqrt7)` Evaluate coefficients `=` `5sqrt7` `5sqrt7`
Quizzes
- Simplify Square Roots 1
- Simplify Square Roots 2
- Simplify Square Roots 3
- Simplify Square Roots 4
- Simplify Surds with Variables 1
- Simplify Surds with Variables 2
- Simplify Surds with Variables 3
- Rewriting Entire and Mixed Surds 1
- Rewriting Entire and Mixed Surds 2
- Add and Subtract Surd Expressions (Basic) 1
- Add and Subtract Surd Expressions (Basic) 2
- Add and Subtract Surd Expressions (Basic) 3
- Add and Subtract Surd Expressions 1
- Add and Subtract Surd Expressions 2
- Add and Subtract Surd Expressions 3
- Multiply Surd Expressions 1
- Multiply Surd Expressions 2
- Multiply Surd Expressions 3
- Multiply Surd Expressions 4
- Divide Surd Expressions 1
- Divide Surd Expressions 2
- Divide Surd Expressions 3
- Multiply and Divide Surd Expressions
- Simplify Surd Expressions using the Distributive Property 1
- Simplify Surd Expressions using the Distributive Property 2
- Simplify Surd Expressions using the Distributive Property 3
- Simplify Binomial Surd Expressions using the FOIL Method 1
- Simplify Binomial Surd Expressions using the FOIL Method 2
- Rationalising the Denominator 1
- Rationalising the Denominator 2
- Rationalising the Denominator 3
- Rationalising the Denominator 4
- Rationalising the Denominator using Conjugates