exam Maths Puzzle Numerical Ability

solve
X^4-10x^2+9=0
and
y-2-8(sqrt)(y-2)+15=0

Thanks!

Read Solution (Total 0)

exam Other Question

f(x)=2x-4, find f^-1(x)

This is the hardest one so far.
Evaluate the discriminant b^2-4ac. Then use the answer to state how many real-number solutions exist for the equation.
〖y=x〗^2+8x+16