exam Maths Puzzle Numerical Ability

PROBLEM:
SOLVE THE INEQUALITY AND WRITE THE SOLUTION IN INTERVAL NOTATION.
2x^2+8x-10>0

****I KNOW HOW TO SOLVE AN INEQUALITY BUT THIS ONE IS A LITTLE HARDER THAN USUAL...
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exam Other Question
Perform the indicated divisions.
x^2 - 2x - 35 / x + 5

I am a little confused with this problem and need a little help.

Thanks. Find values for m and b in the following system so that the solution to the system
is (-3, 4).
5x + 7y = b
mx + y = 22