Question

Simplify [(x-4)^2 - (sqrt(5))^2].

Answer 1

x^2-8x+16-5 which is x^2-8x+11

Answer 2

Is there any chance you can tell me how you did that?

Answer 3

(x-4)^2=x^2-8x+16 which is from(a-b)^2=a^2-2ab+b^2
and 5^1/2*2 the twos get canceled leaving u with only 5
thus x^2-8x+16-5 which is x^2-8x+11

Answer 4

[(x-4)^2 - (sqrt(5))^2]
(x-4)(x-4) - 5
x^2-4x-4x+16 -5
x^2-8x+16-5
x^2-8x+11

Answer 5

if theres still a part you dont understand feel free to ask

Answer 6

Thank you both so much!