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yannabby26
24.09.2020 •
Mathematics
Someone please helppppp
Find a simplified expression to represent the area of the triangle. The area formula for a triangle is 1/2 by, where b is the base and h is the height.
The expression that represents the area of this triangle is ___x2 + ___x + ___cm2.
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Ответ:
4x^2 +22x -12
Step-by-step explanation:
The area of a triangle is
A =1/2 bh where b is the base and h is the height
A =1/2 ( 4x-2) ( 2x+12)
Distribute
= (2x-1) ( 2x+12)
FOIL
first 2x*2x = 4x^2
outer 2x * 12 = 24x
inner -1 *2x = -2x
last -1 * 12 = -12
Add them together
4x^2 +24x -2x -12
Combine like terms
4x^2 +22x -12
Ответ: