exam Maths Puzzle Numerical Ability

Use the given root to find the solution set of the polynomial equation.

x^4 - 21x^2 - 100 = 0

Root = 2i

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exam Other Question

Mary and Lucy both leave from the same bus station. Mary drives 10mph slower than Lucy. In three hours, the are 260 miles apart. How do you set up an equation to solve?

~Confidently Confused~ The supply equation is y=28x+2025 and the demand equation is y=-17x+6120. The equlibrium demand is.