exam Maths Puzzle Numerical Ability

HOW DID PEOPLE GET THE FORMULA A=1/2(B1+B2)H FROM A=BH

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exam Other Question

Find a quadratic function in the form of y = ax2 + bx + c that would have the given roots.

1. x = 2i and x = -2i
2. x =3 + i and x = 3 - i -4-√([9] )+7^2