Question

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(4a-6b)³+(7a+9b)³

Answer 1

Step-by-step explanation:

(4a-6b)³+(7a+9b)³

=(4a)^3-3(4a)^2(6b)+3(4a)(6b)^2-(6b)^3

+(7a)^3+3(7a)^2(9b)+3(7a)(9b)^2+(9b)^3

=16a^3-288a^2b+432ab^2-36b^3

+49a^3+1323a^2b+1703ab^2+81b^3

=16a^3+49a^3-288a^2b+1323a^2b+432ab^2+1703ab^22-36b^3+81b^3

=65a^3+1035a^2b+2135ab^2+45b^3

=65a^3+ab(1035a+2135b)+45b^3