Solve n^2+n-90=0 to find the value of n?

Using the quadratic formula with a calculator a=1 b=1 c=-90 answers are n=-10 and n=9Factorising (n-9)(n+10)=0 answers are n=-10 and n=9

Answered by Asher L. Maths tutor

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Solve the linear simultaneous equations: 3x + 5y = 45, 2x - 9y = -7


Kelly is trying to work out the two values of w for which 3w - w^3 = 2 Her values are 1 and -1 Are her values correct? You must show your working.


solve (y+1)^2 = 4


expand out the bracket (2m - 3)(m + 1).


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