alexusjones6042
29.06.2019 •
Mathematics
Which of the following is the correct factorization of the trinomial below -7x^2-4x+20 a: (-7x+10)(x-2) b: -1(7x-10)(x=2) c: -7(x-5)(x+2) d: 7(x++2)
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Ответ:
B : - 1 ( 7x - 10 ) ( x + 2 )
STEP-BY-STEP SOLUTION:
= - 7x^2 - 4x + 20
= - [ 7x^2 + 4x - 20 ]
= - [ 7x^2 + 14x - 10x - 20 ]
= - [ 7x ( x + 2 ) - 10 ( x + 2 ) ]
= - ( x + 2 ) ( 7x - 10 )
= - 1 ( 7x - 10 ) ( x + 2 )
Ответ:
A: (-7x+10)(x-2)
Step-by-step explanation:
Given trinomial,
By middle term splitting,
Since, further factorization is not possible,
Thus, the required factorized form of the given trinomial is,
Option A is correct.
Ответ:
No. Each triangle has base of 6 meters but there is not enough information to determine the heights of the triangles