Identify Common Factor: Identify the common factor in all three terms of the expression.The common factor is (4x+5).
Factor Out Common Factor: Factor out the common factor (4x+5) from each term.x2(4x+5)−x(4x+5)−30(4x+5)=(4x+5)(x2−x−30)
Factor Quadratic Expression: Now, factor the quadratic expression x2−x−30. We look for two numbers that multiply to −30 and add up to −1 (the coefficient of x). The numbers −6 and +5 satisfy these conditions.
Write Factored Form: Write the factored form of the quadratic expression using the numbers found in the previous step. x2−x−30=(x−6)(x+5)
Combine Factored Expressions: Combine the factored quadratic with the previously factored out common factor.(4x+5)(x2−x−30)=(4x+5)(x−6)(x+5)
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