Question

(x-8)^2=20
give exact solutions and to three decimal places

Answer 1

first foil the left hand side

Answer 2

then subtract 20 from both sides so you get a quadratic equal to zero. then use the quad formula to solve for x.

Answer 3

(x-4)(x+4)?

Answer 4

no. (x-8)^2 = (x-8)(x-8)
now foil

Answer 5

x^2-8x-8x-64
x^2-64

Answer 6

combine the -8x and -8x to get -16x, and (-8)*(-8) = +64, so after foiling you should get
x^2 -16x +64

Answer 7

oh dang so I add instead of subtract them?

Answer 8

yes, because they are both negative.

Answer 9

ok so how do i get my solutions?