Identify common factor: Identify the common factor.The common factor in all terms is −4.Factor out −4 from each term.−4x2−44x+104=−4(x2+11x−26)
Factor out common factor: Factor the quadratic expression inside the parentheses.We need to find two numbers that multiply to −4×−26 (which is 104) and add up to 11.The numbers that satisfy these conditions are 13 and −8.So, we can write the quadratic as:−4(x2+11x−26)=−4((x+13)(x−8))
Factor quadratic expression: Check the factored form.Multiply the factors to ensure they give the original quadratic expression.−4(x+13)(x−8)=−4(x2−8x+13x−104)=−4(x2+5x−104)=−4x2−20x+416This is not the original expression, so there is a mistake.
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