Question

Multiply
(√6+5√12)(6-5√12)
i got 6-300= -294
I feel like this might be wrong. Can somebody assist?

Answer 1

sorry it should be (√6+5√12)(√6-5√12)

Answer 2

true difference of 2 squares

Answer 3

ok so -294 is the final answer than

Answer 4

yes

Answer 5

ok cool, i was confusing this problem with foil ty much

Answer 6

You can use FOIL, but if you do you will see that two of the terms cancel each other. So it is quicker to recognize the special case (a+b)(a-b)= a^2 - b^2