How do you solve it?

Question

asked Nov 21, 2021 219k views

1 Answer

MaanooAk · Answer 1 · 2021-11-25T22:40:46+0000

Answer:

i: x=-2, x=1

ii: x=-1/2

Explanation:

Quadratic form:

You solve i by using FOIL (First, Outside, Inside, Last) because it is a multiplication problem.

(x+2)(x-1)=0

"first" would be
x*x , which would equal
x^(2)

"outside" would be
x*-1 , which would equal
-1x, or -x

"inside" would be
2*x , which would equal

"last" would be
2*-1 , which would equal

Now you need to combine the terms so that they are one after the other

x^(2)-x
+2x-2

Combine like terms, and you should get:

x^(2) +x-2

i Solution

You need to get the variable by itself.

Subtract two from both sides

$x+2=0\\x=-2$

Add one to both sides.

$x-1=0\\x=1$

ii Solution

Add all the terms.

$x+2+x-1=0\\2x+1=0\\2x=-1\\x=-(1)/(2)$