How do you write #(x^2 + 4x – 3)(2x^2 + x + 6)# in standard form?

1 Answer
Dec 12, 2017

Answer:

#2x^4+9x^3+4x^2+21x-18#

Explanation:

This is a long one, but it's not difficult, as long as we watch our signs

#(x^2+4x-3)(2x^2+x+6)#

#2x^4+x^3+6x^2+8x^3+4x^2+24x-6x^2-3x-18#

combine like terms:

#2x^4+(1x^3+8x^3)+(6x^2+4x^2-6x^2)+(24x-3x)-18#

#2x^4+9x^3+4x^2+21x-18#