Question

x2 + 7 − 120 = 0

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Answer 1

Answer:

x = -15 , 8

Step-by-step explanation:

x²+7x-120

= x²+(15-8)x-120

= x²+15x-8x-120

= x(x+15)-8(x+15)

= (x+15)+(x-8)

x²+7x-120 = 0

=> (x+15)+(x-8) = 0

=> x+15 = 0 => x-8 = 0

=> x = -15 => x = 8

Answer 2

Answer:

x=56.5

Step-by-step explanation:

x2=0+120-7

x2= 0+113

x2=113

x=113/2

x=56.5