Question

Solve the system of equations: y = x2 –x – 8 and y – x = 7.

Answer 1

Answer:

y=x2-x-8 (1)

y-x=7 (2)

Step-by-step explanation:

substitute equation one in equation two

x2-x-8-x=7

x2-2x=15

x2-5x+3x-15

×(x-5) 3 (x-5)

(x+3) (x-5)

☺

x= -3,+5

if x=5

then

y=7 +5

y=12

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