How do you write # (2x^2 - 5x + 4) ^2 in standard form?

1 Answer
Tony B
May 18, 2017

#4x^4-20x^3-41x^2-40x+16#

Explanation:

#color(blue)((2x^2-5x+4))color(green)((2x^2-5x+4))#

Multiply everything inside the right bracket by everything in the left.

#color(blue)(color(white)(-)2x^2)color(green)((2x^2-5x+4)) -> 4x^4-10x^3+8x^2#
#color(white)(.)color(blue)(-5x)color(green)((2x^2-5x+4)) ->" "-10x^3+25x^2-20x#
#color(white)(..)color(blue)(+4)color(green)((2x^2-5x+4)) ->ul(" "+8x^2-20x+16) #
#" "4x^4-20x^3-41x^2-40x+16#

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