Mathematics
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OpenStudy (anonymous):
Find the product of (2x − 5y)^2.
A) 4x^2 + 20xy + 25y^2
B) 4x^2 − 20xy + 25y^2
C) 4x^2 − 25y^2
D) 4x^2 + 25y^2
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OpenStudy (anonymous):
@Notamathgenius
OpenStudy (anonymous):
@dmezzullo
OpenStudy (dmezzullo):
what is 4x4?
what is 5x5?
OpenStudy (anonymous):
4x^2-20xy+25y^2
OpenStudy (anonymous):
16 and 25
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OpenStudy (lopus):
is simple is B
only is (2x-5y)*(2x-5y)
OpenStudy (anonymous):
thats the answer
OpenStudy (dmezzullo):
Wait wrong thing, lemme redo it
OpenStudy (anonymous):
the answe is D
OpenStudy (dmezzullo):
ok so 2x2 is ??
and 5x5 is ??
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OpenStudy (dmezzullo):
@bahupepe Do not jus give the answer out explain it also this is a site to learn.
Welcome to OPenstudy!! also
OpenStudy (anonymous):
So its D?
OpenStudy (lopus):
OMG
OpenStudy (dmezzullo):
Yes it is D, But in the future guys plz explain the problem.
OpenStudy (anonymous):
Find the product of (x + 3)^2.
x^2 + 6x + 9
x^2 − 6x + 9
x^2 − 9
x^2 + 9
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OpenStudy (anonymous):
okay
(2x-5y)(2x-5y)
4x^2-10xy-10xy+25y^2
4x^2-20xy+25y^2
OpenStudy (dmezzullo):
Ok so x times x ??
3x3 ??
OpenStudy (anonymous):
3x3 = 9
x times x = idk
OpenStudy (dmezzullo):
ok so x times x would jus be x^2 bc u are jus timesing it by itself.
OpenStudy (dmezzullo):
So then wut do u think the answer is?
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OpenStudy (lopus):
(x+3)*(x+3)= (x^2+3x+3x+9) you're joke
OpenStudy (anonymous):
oh okay. so am i adding or subtracting?
OpenStudy (dmezzullo):
Adding.
OpenStudy (lopus):
x*X=x^2
OpenStudy (anonymous):
So D?
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OpenStudy (dmezzullo):
Yes.