Answer:
x= -8 , x=5
Step-by-step explanation:
2x^2+6x-80=0
x^2+3x-40=0
look for 2 numbers that their:
sum = 3
product = -40
(x+8)(x-5)=0
thus
x= -8 , x=5 (ANS)
Solution = 2(x-5)(x+8)
1. Common Factor
2(x^2+3x-40)
2. Use Sum Product pattern
2(x^2+8x-5x-40)
3. Common Factor from the two pairs
2(x-5)(x+8)
