exam Maths Puzzle Numerical Ability

How would you solve (x)2+bx+36 by using (b over 2)all raised to 2?

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exam Other Question

Determine whether each ordered pair is a solution of the given equation.

y=8-4x (8,0), (16,-2), (3,-4) Both Gaussian Elimination and Cramer's rule are used for solving linear systems. If you need to solve large systems with more that three variables, which method is more effieient a