For the equation to work, you have to have the same number on both sides of the equal sign
so to find ?, you can do:
13 - 2 = 12 - ? Simplify
11 = 12 - ? Subtract 12 on both sides
-1 = - ? Multiply -1 on both sides
1 = ?
Step-by-step explanation:
2x²+3x-2=0
(2x-1)(x+2)
x+2=0
x=-2 (no, because x must be >0)
2x-1=0
2x=1
x=½ (yes, because x>0)
Answer:
Vertex: 
Solutions: (0,-7), (1, -1), (2, 7)
I hope this helps!
Answer:
= 40
Step-by-step explanation:
2 ( 3 (5 + 2) -1)
= 2 * 20
= 40