book Maths Puzzle Numerical Ability

I need help calculating the area between the y-axis and y = x squared, from y = 4 and y = 9. I beleive my graph would show a parabola, however I am not sure. Would you please hel

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book Other Question

Solve.

m³+ 2m² - 3m = 0
How can you prove that:

odd + odd = even
even + even = even (you initially put even + even = odd)
odd + even = odd

????