Question

$(2x + 1) {}^{2} - (x - 1) {}^{2} + 4x$
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Answer 1

Distribute:

=4x^2+4x+1+−x^2+2x+−1+4x

Combinar términos comunes:

=4x^2+4x+1+−x^2+2x+−1+4x

=(4x^2+−x^2)+(4x+2x+4x)+(1+−1)

=3x^2+10x

solución:

=3x^2+10x