book Maths Puzzle Numerical Ability

(ax3-3x2+2BX-2)-(2X3-CX2-5X-4D)=X2+X-6
FIND THE VALUE OF ABCD

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book Other Question

Find the dimensions of the square picture that make the area of the picture equal to 75%of the total area enclosed by the frame. the toatl are of the frame is 144in please can u help me ok i have done 21 of these and here are the ones i cant get...

Use log9^7=0.8856 and log9^4=0.6309 to evaluate each expression

log9^28
log9^49
log9^144
log9^15.75