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amelvin41
09.12.2020 •
Mathematics
Can someone actually help for once
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Ответ:
B. x-5
Step-by-step explanation:
Step 1: Subtract 3x from both sides.
4x−5−3x=3x−10−3x
x−5=−10
Step 2: Add 5 to both sides.
x−5+5=−10+5
x=−5
Hope this helped :)
Ответ:
B
Step-by-step explanation: Step 1: Subtract 3x from both sides.
4x−5−3x=3x−10−3x
x−5=−10
Step 2: Add 5 to both sides.
x−5+5=−10+5
x=−5
hope this help
Ответ:
A. (4x +3)²
B. (2x -7y)(2x +7y)
Step-by-step explanation:
An exponent is conventionally indicated by a caret (^). Only the first number or letter after the caret is the exponent, unless you put parentheses.
A. The form of a perfect square trinomial is ...
(a +b)^2 = a^2 +2ab +b^2
The factors are easily found as the square roots of the first and last terms.
16x^2 +24x +9 = (√(16x^2) +√9)^2 = (4x +3)^2
__
B. The factorization of the difference of squares is another form you can memorize.
a^2 - b^2 = (a -b)(a +b)
Here, you have ...
a = √(4x^2) = 2x
b = √(49y^2) = 7y
so, the factorization is ...
(2x -7y)(2x +7y)