exam Maths Puzzle Numerical Ability

I am lost here, can someone help me?

Find the x-intercepts

y=x^2-4x+4

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exam Other Question

What is the minimum number of unique points that are required to determine the
equation for a fourth order quadratic?
a. 6
b. 5
c. 3
d. 4 given:CP IS CONGRUENT TO FQ AND PD IS CONGRUENT TO QG

PROVE: CD IS CONGRUENT TO FG