book Maths Puzzle Numerical Ability

what is the value of Y when X=-3 for the function Y=4Xsquared+3X-1

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book Other Question

x^2-8x+16/x^2+6x-7
X
x^2+2x-3/x^2-x-12
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A right-angle triangle has hypoteneuse 10 inches, and the height drawn from the right angle to the hypoteneuse is 6 inches. Find the area of this right-angle triangle