Recognize as quadratic in y2: Recognize the polynomial as a quadratic in terms of y2. The given polynomial 10y4−21y2w2−13w4 can be treated as a quadratic equation in y2, where y2 is the variable and 10, −21w2, and −13w4 are the coefficients.
Factor using middle term: Factor the quadratic polynomial using the middle term factor method or any other suitable factoring technique.We need to find two numbers that multiply to (10)(−13w4)=−130w4 and add up to −21w2. These two numbers are −26w2 and 5w2.
Rewrite middle term: Rewrite the middle term of the polynomial using the two numbers found in Step 2.10y4−26y2w2+5y2w2−13w4
Factor by grouping: Factor by grouping.Group the terms to factor by grouping:(10y4−26y2w2)+(5y2w2−13w4)Now factor out the common factors from each group:2y2(5y2−13w2)+w2(5y2−13w2)
Factor out common factor: Factor out the common binomial factor.Both groups contain the common factor (5y2−13w2), so we can factor this out:(2y2+w2)(5y2−13w2)
Check for further factorization: Check the factors to ensure they cannot be factored further.The factors (2y2+w2) and (5y2−13w2) cannot be factored further over the integers. Therefore, the factorization is complete.
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