Question

5√7 + 12√6 - 10√7 - 5√6

Answer 1

\[5(7)^{\frac{1}{2}} = 5\sqrt{7}\]

add like terms

Answer 2

(5-10)sqrt7+(12-5)sqrt6
-5sqrt7+7sqrt6 Ans

Answer 3

its just like dealing with a variable,

\[(7)^{\frac{1}{2}}\]

is just a number,

\[5(7)^{\frac{1}{2}} = (7)^{\frac{1}{2}} + (7)^{\frac{1}{2}} + (7)^{\frac{1}{2}} + (7)^{\frac{1}{2}} + (7)^{\frac{1}{2}}\]

Answer 4

you cant add,

\[(7)^{\frac{1}{2}} + (6)^{\frac{1}{2}}\]

without generating a fraction, in mathematics you usually want to deal with exact numbers

Answer 5

@Australopithecus so is the aswer 5√7 - 7√6 ?

Answer 6

Be careful with negatives
https://www.wolframalpha.com/input/?i=5%E2%88%9A7+%2B+12%E2%88%9A6+-+10%E2%88%9A7+-+5%E2%88%9A6

Answer 7

ohh ok i see. thnx