exam Maths Puzzle Numerical Ability

Will someone please help me solve this problem> factor completly:5x^2+2x-16

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exam Other Question

find the slope of the line that crosses the x-axis at -6 and the y-axis -2. 1)compute:
log_2(2^square root of 3)

2) solve for x:
log_x(4)=-3

3) show log_b(A/D)= log_b(A)-log_b(D)
log_4[-4^3x^(square root of x-1)/(x+1)^3

4)solve f