Which expression is eqivalent to (x^2-3x)(4x^2+2x-9)
1 answer:
For this case we must find an expression equivalent to:
Applying distributive property considering that:
To multiply powers of the same base, the same base is placed and the exponents are added:
We add similar terms taking into account that:
Equal signs are added and the same sign is placed.
Different signs are subtracted and the major sign is placed.
Answer:
An equivalent expression is:
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That's a trapezoid,
Answer: 32
But say we didn't know the formula. We can chop out the 4 by 4 square and we have two 45/45/90 triangles side 4 left over, so two 4 by 4 squares,
A = 2(4)(4) = 32
We can think of this as 12 by 4 rectangle with two 4 by 4 right triangles chopped out:
A = 12(4) - 2(1/2)(4)(4) = 48 - 16 = 32