Question

Given y+2=X and y=x²-x-10
Solve for X and y simultaneously

Answer 1

Answer:

x=4, y=2

Step-by-step explanation:

y=x-2_____(i)

y=x²-x-10_____(ii)

substituting eq (i) in eq (ii)__

x-2=x²-x-10___(iii)

x²-2x-8=0

(x+2)(x-4)=0

so, x= -2 or 4

putting x = 4 in eq (iii)

4-2=4²-4-10

2=2

hence, x = 2 is the right answer

since, y=x-2

y=4-2

y=2

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