Question

C= ( x + 1 )^2 - ( 2 x - 1 ) + 3( x - 2 ) ( x + 2 )

Answer 1

\(C=\left(x+1\right)^2-\left(2x-1\right)+3\left(x-2\right)\left(x+2\right)\)

\(=x^2+2x+1+1-2x+3\left(x^2-4\right)=x^2+2+3x^2-12=4x^2-10\)

Answer 2

C = (x + 1)² - (2x - 1) + 3(x - 2)(x + 2)

C = x² + 2x + 1 - 2x + 1 + 3(x² - 4)

C = x² + 2x + 1 - 2x + 1 + 3x² - 12

C = x² + 3x² + 2x - 2x + 1 + 1 - 12

C = 4x² - 10

C = 2(2x² - 5)

Answer 3

\(C=\left(x+1\right)^2-\left(2x-1\right)+3\left(x-2\right)\left(x+2\right)\)

\(=x^2+2x+1-2x+1+3x^2-12\)

\(=4x^2-10\)

Answer 4

\(C=\left(x+1\right)^2-\left(2x-1\right)^2+3\left(x-2\right)\left(x+2\right)\)

\(=x^2+2x+1-4x^2+4x-1+3x^2-12\)

=6x-12