4.08 quiz: factoring difference of squares

question 1 (20 points)

factor: x^2 - 36

a.) (x - 6)(x + 6)

b.) (x - 6)^2

c.) (x - 36)(x + 36)

d.) (x + 36)^2

question 2 (10 points)

factor: 4x^4 - 64

a.) (4x - 8)(4x + 8)

b.) (2x^2 -8)2

c.) (2x^2 - 32)(2x^2 + 32)

d.) (2x^2 + 8)(2x^2 - 8)

you from k12? me too if so :)

i already took this and C and A are the answers

let soccer = x and golf = y

part a

1st equation: x + y = 125

2nd equation: x = y +45

part b

replace x in the 1st equation with the 2nd one:

y + 45 + y = 125

simplify:

2y + 45 = 125

subtract 45 from each side:

2y = 80

divide both sides by 2:

y = 80/2

y = 40

she plays golf for 40 minutes.

part c

no because she plays soccer for 45 minutes longer than golf 40 +45 =   85 minutes, not 80 minutes.

he can buy 4lbs. of live bait and 1lbs of natural bait

step-by-step explanation: