Finish all objectives 1C (16 topics) on Exponents and Polynomials. It contains about 25 questions
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O EXPONENTS AND POLYNOMIALS
Factoring a quadratic with le…
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? QUESTION
Learning Page
Factor.
22 – 122 + 20
OO EXPLANATION
To factor 72 – 12z +20 is to write it as a product (z + m)(z +n), where mai
22- 12z +20=(z + m) (z+n)
From this equation, we get that the product of m and n is 20 and t
So we’ll try integer values for m and n whose product is 20 and che
m
n
m+n
1
20
21
-1 -20 -21
2.
12
-2
– 10 – 12
4
5
9
4
5
9
We see that m=-2 and n=- 10 have a product of 20 and a sum of – 1
So we get the following.
22 – 122 + 20= (2-2)(z- 10)
The answer is (z – 2)(z – 10).
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