exam
Maths Puzzle
Numerical Ability
solve
X^4-10x^2+9=0
and
y-2-8(sqrt)(y-2)+15=0
Thanks!
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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