Question

What is the product of (-a + 3)(a + 4)?


a^2 - a - 12

-a^2 - a - 12

-a^2 - a + 12

a^2 - a + 12

Answer 1

C

Answer 2

(x+9)(x+4)

Answer 3

Factor a^2 - a - 20

Answer 4

In order to find the solution of this, we'll have to take a look at the "distributive" postulate, wich fortunately for me, it's a postulate and it does not require proof.
I'll show it to you:
\[a(b+c)= ab+ac\]
simple, it just states, that if we have a number multiplying the sum of other two, it's the same as multiplying each term by the number "a" and adding them:
so for the problem:
\[(-a+3)(a+4)= -a ^{2}-4a+3a+12\]
simplifyin we get:
\[-a ^{2}-a+12\]

Answer 5

(a+4)(a-5) , @xo_kansasprincess_xo

Answer 6

Factor x^2 - 5x - 14