Asked by sara
simplify (5x-4)^2
I got 25x^2 -16
is that right?
I got 25x^2 -16
is that right?
Answers
Answered by
MathMate
If you worked according to the FOIL rule, you would expect 4 terms, which simplify to 3 in this case.
A standard identity for the square of a binomial is as follows:
(a+b)²
=a²+2ab+b²
so
(5x)²= 25x²
2(5x)(-4)=-40x
(-4)²=+16
So altogether:
(5x-4)²=25x²-40x+16
A standard identity for the square of a binomial is as follows:
(a+b)²
=a²+2ab+b²
so
(5x)²= 25x²
2(5x)(-4)=-40x
(-4)²=+16
So altogether:
(5x-4)²=25x²-40x+16
Answered by
sara
okay thanks :)
Answered by
mary
how to solve .25x + 2 = 12
Answered by
Carlie
.25x+2=12
-2 -2
------------
.25x=10
--------
.25 .25
x=40
-2 -2
------------
.25x=10
--------
.25 .25
x=40
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.