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How do I solve inequalities when they're not linear?

Ok, let's talk about quadratic inequalities in particular. Look at the inequality x^2 - 8x + 15 > 0.What does a solution to this mean? It means the curve x^2 - 8x + 15 > 0 is above the x-axis at this p...
DF
Answered by Damon F. • Maths tutor
3456 Views

Solve the simultaneous equation: (16^x)/(8^y)=1/4 and (4^x)(2^y)=16

This solution requires you to use your knowledge of power extensively. The final must be shown with a lot of working out, the solution is x=1 and y=2.
SA
Answered by SYED A. • Maths tutor
4308 Views

Solve this simultaneous equation: 3x + y = 10, x + y = 4

x = 3
HM
Answered by Hibah M. • Maths tutor
3290 Views

Solve this simultaneous equation for x: 3x + y = 10, x + y = 4

x = 3
HM
Answered by Hibah M. • Maths tutor
4135 Views

Rationalise the denominator of 1/(4 + sqrt(3))

This denominator is irrational because it contains a surd. To rationalise the denominator we multiply the numerator and denominator by the conjugate of the denominator. In this case, the conjugate of the den...
GM
Answered by Giles M. • Maths tutor
7791 Views