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y= x^2 + 12
y= x + 14
Since they are both equal to y, they must be equal to each other. Therefore:
Factorise (alternatively you can use the quadratic formula):
Since anything times 0 is 0, then either x-2 or x-1 must be 0. Therefore x is:
x=2 or x=1
Daniel, you mean x = 2 or -1.