exam Maths Puzzle Numerical Ability

Solve by completing the square:
x2 + 6x + 2 = 0

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exam Other Question

Write an equation for the line containing the indicated points.
(-6,-6) and (-3,1) Hi! Could someone please help me with these problems. I need to simplify and all exponents should be positive.

(x+4)^2

(x+5y)(x-5y)

(x^3+7x^2+7x-15)/(x+3)

Thanks so much for your help!