Solve each quadratic equation by Factoring
x^2 - 15x + 56 = 0
2x^2 + 4x - 70 + 0
2z^2 + 8x = 5x + 20
x^2 + 6x + 9 = 0 please show how you received the answer by factoring thank you.

Question

Solve each quadratic equation by Factoring
 x^2 - 15x + 56 = 0
2x^2 + 4x - 70 + 0
2z^2 + 8x = 5x + 20
x^2 + 6x + 9 = 0 please show how you received the answer by factoring thank you.

anonymous · Answer

(x-8)(x-7)=0, number 1  -8*-7=56, 
(2x-10)(x+7)=0, number 2  -10*7=-70
2x^2+3x-20=0, (2x-5)(x+4)=0, number 3
(x+3)^2=0, number 4

anonymous · Answer

oh crap the last one was supposed to be x^2 + 6x + 9 = 9, i dont understand that

anonymous · Answer

and how is 2x^2 distributed??

anonymous · Answer

the last one will be if it is x^@+6x+9=9,

subtract the 9 to get the one side = 0

x^2+6x=0   

GCF : x
x(x+6)=0