Work Step by Step
Given: $x^2-4x=45$ or, $x^2-4x-45=0$ Need to use factorization to solve the quadratic equation. This can be factorized as follows: $x^2+5x-9x-45=0$ or, $(x+5)(x-9)=0$ Now $x+5=0$ and $x-9=0$ Roots are $x=-5,9$
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