Identify quadratic expression: Identify the quadratic expression to be factored.The given expression is 2x2+9x−35.
Find suitable numbers: Look for two numbers that multiply to give the product of the coefficient of x2 (which is 2) and the constant term (which is −35), and add up to the coefficient of x (which is 9).The product of the coefficient of x2 and the constant term is 2×(−35)=−70.We need two numbers that multiply to −70 and add up to 9.The numbers 14 and 20 satisfy these conditions because 21 and 22.
Rewrite middle term: Rewrite the middle term 9x using the two numbers found in the previous step.The expression 2x2+9x−35 can be rewritten as 2x2+14x−5x−35.
Factor by grouping: Factor by grouping.Group the terms to factor common terms out of each group.(2x2+14x)−(5x+35)Factor out 2x from the first group and −5 from the second group.2x(x+7)−5(x+7)
Factor out common binomial: Factor out the common binomial factor (x+7). The expression now becomes (2x−5)(x+7).
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