exam Maths Puzzle Numerical Ability

Please can you help me, I tried figuring it out but no luck.
4x^4= 13x^2-9

Read Solution (Total 0)

exam Other Question

The fahrenheit and cesius scales are related by the equation f=9/5C+32. What temperature Cesius would give the body temp. of 98.6F? Can someone help me on this problem?

I need to find the slope of any line perpendicular to the line through points (0, 5) and (-3, -4)

Thanks,
Sher