exam Maths Puzzle Numerical Ability

the solution of

a.) 10x²+21-10=0
b.) 60y²+32y-15=0
c.) 3x²+32x-48=0
d.) 3x²+13x-10=0
e.) 2y²+5y-25=0

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exam Other Question

The product of two positive consecutive odd integers is 339. The sum of these two integers is: solve :

log(base3)(3x+4)=log(base3)49