Question

3 .y= x^2 – 2x + 7
Y= 2x + 3
4 . y= x^2 – 4
Y= 3x -6

Answer 1

Y₁=y₂
x²-2x+7=2x+3
x²-2x-2x+7-3=0
x²-4x+4=0
(x-2)(x-2)=0
x₁=2
x₂=2

y₁=y₂
x²-4=3x-6
x²-3x-4+6=0
x²-3x+2=0
(x-2)(x-1)=0
x₁=2 
x₂=1
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