Question

Expand with identity:
(5a^2+3b-7c)^2

Answer 1

Step-by-step explanation:

5a2+3b−7c)2

=(5a2+3b+−7c)(5a2+3b+−7c)

=(5a2)(5a2)+(5a2)(3b)+(5a2)(−7c)+(3b)(5a2)+(3b)(3b)+(3b)(−7c)+(−7c)(5a2)+(−7c)(3b)+(−7c)(−7c)

=25a4+15a2b−35a2c+15a2b+9b2−21bc−35a2c−21bc+49c2

=25a4+30a2b−70a2c+9b2−42bc+49c2 ans