exam Maths Puzzle Numerical Ability

I am stuck on the problem. Can someone help?

Solve by graphing.
x^2+2x=8
Thanks

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exam Other Question

At Bulbs-R-Us, halogen light bulbs cost $14.50 each and fluorescent bolbs cost $19.00 each. One day the receipts for a total of 376 bulbs were $6469.00. How many halogen bulbs were find the reference angle in radians for the given angle. Round to the nearest hundredth if necessary.
a)2.5 pi b)2.5__ c)-11 pi__