exam Maths Puzzle Numerical Ability

Determine the solutions for the following polynomial equation.

(2x+6)^2 =36

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exam Other Question

please help me,
show whether or not(5,3) is a solution of the system:
3x+2y=21
x+y=8
Please help me, I have posted this question several times with no response. Please someone help.

For the following function, C computes the cost in millions of dollars of implem