exam Maths Puzzle Numerical Ability

4x^2+3=5x

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exam Other Question

how do i solve this :

Find the area of a rectangle if three of its corners are (-0.1,-3.4), (-7.9,-3.4), and (-0.1,6.8). Solve for x:
a) (log base2 x)^2-(logbase2 x^2)=0
b) log base2(logbasex 64)=1
c) log base5(5x+2)=1/2 logbase5 49+logbase5 16