Question

Which of the following represents the area of a rectangle whose length is x + 4 and whose width is
x - 9?

x2- 36

x2+ 5x - 36

x2- 5x - 36

x2+ 36x - 5

Answer 1

(x + 4)(x - 9)

FOIL.

Answer 2

im still confused..

Answer 3

Have you learned multiplication of polynomials?

Answer 4

nope..

Answer 5

I dunno what school is turning into...

Answer 6

FOIL: First, Outer, Inner, Last

(x + 4)(x - 9)
x^2 - 9x + 4x - 36
x^2 - 5x - 36 (Upon adding like terms)

The modern school system is crap.

Answer 7

lol. its probly the next lesson but lately everything is being taught backwards

Answer 8

@Compassionate how did you end up getting the 36 ?

Answer 9

By multiply 4 x - 9

Answer 10

thank you so much. c: