Question

check whether the following are quadratic equation.x(x+3)-7=(x+5)(x-5). write in step by step

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Answer 1

Answer:

equation 1,

$x(x + 3) - 7 = 0 \\ {x }^{2} + 3x - 7 = 0$

equation 2,

$(x + 5)(x - 5) = 0 \\ x(x - 5) + 5(x - 5) = 0 \\ x { }^{2} - 5x + 5x - 25 = 0 \\ x { }^{2} - 25 = 0$

so, L.H.S are not equal to R.H.S.

Answer 2

Answer:

x^2+3x-7= x^2-25

so x^2 terms will be terminated so it's not a quadratic equation