exam Maths Puzzle Numerical Ability

(4x2+6)^2

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exam Other Question

Solve.

7x + x(x-3) = 0

Find the x-intercepts of f(x)= 7x + x(x-3)

a. What are the solutions?
b. What are the x-intercepts?

Please help, I keep getting confused and told I do not have the correct answer.
Kite: A = 150 sq. ft.
d1 = 20
Find d2