(x+4) (x+5)= ?

Answer 1

x^2 + 9x +20

Answer 2

Use the foil method (First, Outer, Inner, Last) which means do x times x, x times 5, x times 4, and 4 times 5.... soo x squared + (5x + 4x) + 20........answer is x^2+9x+20

Answer 3

This is a classic algebra problem.

The goal of the problem is to teach you the FOIL method.
Firsts
Outsides
Insides
Lasts

This assures that you properly multiple out the terms.
Here:
F: x * x = x^2
O: x * 5 = 5x
I: 4 * x = 4x
L: 4*5 = 20

adding them together: x^2 + 5x + 4X +20
combining like terms: x^2 + 9x +20

It is more important to show your work in problems like this then what your answer is. The goal is to make sure you do the procedure right.

Answer 4

x^2 + 9x + 20 = 0

Answer 5

Use the 'FOIL' method.
F- First
O- Outside
I- Inside
L- Last
First, you multiply the first two number from the two problems.
(x)(x)= x2 (x squared) - x2+ [bring the sign down from the problem]
Then it's (x)(5)= 5x - x2=5x
(4)(x)= 4x - x2+5x+4x+
(4)(5)= 20- x2+9x+20 => 9X BECAUSE OF THE LIKE TERMS.
The whole problem should look lik this:
x2(squared) +9x+20

Answer 6

(X+4)(X+5)=
XxX + 5X +4X +4x5=
X^2 +9x +20

or you can continue by saying that X^2 +9x equals -20.

Answer 7

x^2+9x+20

Answer 8

x^2+9x+20

Answer 9

X2+4x+5x+20
=x2+9x+20.
x2, where 2 is a superscript.

Answer 10

(x + 4) (x + 5) = (A + B) (C + D)

This is a quadratic equation.

First, multiply A and C to give you x^2 ("x squared").

Next, multiply B and C to give you 4x.

Then, multiply B and D to give you 20.

Since only addition signs are present in the problem, your answer is x^2 + 4x + 20

Have a great day!