Which of the following is equal to r²-22rs+121s²?
A. (-r+11s)²
B. (-r-11s)²
C. (r+11s)²
D. (r-11s)²
--Please do also provide solution. tysm
A. (-r+11s)²
B. (-r-11s)²
C. (r+11s)²
D. (r-11s)²
--Please do also provide solution. tysm
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Answer:
D.
Step-by-step explanation:
the following is a perfect square trinomial
(r-11s)(r-11s)
r²-11rs-11rs+121s²
= r² -22rs +121s²
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Answer:
D
Step-by-step explanation:
since, 11•11=121
and 11+11=22
and r•r=r²
then the sign is negative
checking: you just need to use FOIL method
(r-11s)²
=(r-11s)(r-11s)
=r²-11rs-11rs+121s² (combine like terms)
=r²-22rs+121s²