Question

Use any method to multiply (3a + 2b - c)(a - b + 2c).

Answer 1

3a2_2b2-2c2+ab+5ac-5bc

(3a+2b-c)(a-b+2c)

(6a2-4b2-c2)(-ab+4c2)

-6ab3+24ac4+4ab2-16bc2+abc2-4c3