Question

simplify: (5a + 7) (2a^2 – 5a + 2b^2 – 3).​

Answer 1

Answer:

=(10a^3-11a^2+10ab^2-50a+14b^2-21)

Step-by-step explanation:

=(5a+7)*(2a^2-5a+2b^2-3)

=5a*(2a^2-5a+2b^2-3)+7*(2a^2-5a+2b^2-3)

=(10a^3-25a^2+10ab^2-15a)+(14a^2-35a+14b^2-21)

=(10a^3-25a^2+14a^2+10ab^2-15a-35a+14b^2-21)

=(10a^3-11a^2+10ab^2-50a+14b^2-21)

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