darleansh darleansh

04-10-2020
Mathematics

contestada

solve 2x^2 + 6x - 56 = 0 using square root

Can you show how you solved the problem?

Respuesta :

us8765594229 us8765594229

04-10-2020

Answer:

x=-7 or 4

Step-by-step explanation:

2x²+6x-56=0

2x²+(14-8)x-56=0

2x²+14x-8x-56=0

2x(x+7)-8(x+7)=0

(x+7)(2x-8)=0

x+7=0. 2x-8=0

x=-7. 2x=8

x=4

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