`f(x)= mx^2 + 2x + 5`
`g(x)= 2x^2 - nx -2`
`h(x)= f(x) X g(x)= (mx^2 + 2x +5)(2x^2-nx -2) `
`h(1)= (m+2+5)(2-n-2) = -40 ==> (m+7)(-n)= -40`
`==>(m+7)(n) = 40............(1)`
`h(-1)= (m-2+5)(2+n -2) = 24==> (m+3)(n)= 24`
`==> (m+3)(n) = 24 .............(2)`
We will divide (1) by (2):
`==> (m+7)/(m+3)= 40/24`
`==> (m+7)/(m+3)= 5/3`
`==> 3(m+7)= 5(m+3)`
`==> 3m +21 = 5m+15`
`==> 2m = 6`
`==> m= 3`
`==> (m+3)n = 24`
`==> 6n = 24 ==> n = 24/6 = 4`
`==> f(x)=3x^2+2x + 5`
`==>g(x)= 2x^2 -4x -2`
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