exam Maths Puzzle Numerical Ability

Tutor: Can you help me simplify this expression?

9(x-7)(x+7)/3(x-7)

Thank you

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exam Other Question

Find two quadrants in which there are no points on the graph of y = x^2 + 1.

a. I & II
b. I & III
c. I & IV
d. II & III
e. II & IV
f. III & IV
g. Al of these have points in at least three quadrants. Suppose that a person deposits a total $9,000 for one year. Part of the money is deposited in an account paying 2.1% interest, and the rest is deposited in an account paying 2.4%