write 9x power 2 + 100y power 2 - 60xy in form of a square of binomial and find its value when x = 2 and y = -1
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9x²+100y²-60xy is the square of 3x-10y
9x²-60xy+100y² ⇒(3x)²+(2*3*-10)xy+(-10y)² ⇒(3x-10y)²
if x=2 and y=-1
then,
(3x-10y)²
⇒(3*2-10*-1)²
⇒(6+10)²
⇒256
i hope this helps!!
9x²-60xy+100y² ⇒(3x)²+(2*3*-10)xy+(-10y)² ⇒(3x-10y)²
if x=2 and y=-1
then,
(3x-10y)²
⇒(3*2-10*-1)²
⇒(6+10)²
⇒256
i hope this helps!!
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Answered by
3
Answer:
256 correct answer..
Step-by-step explanation:
9x²+100y²-60xy.
(3x)²+(10y)²-2(3x)(10y)
(3x-10y)².
put,
x=2,y= -1.
[3(2)-10(-1)]²
[6-(-10)]²
(16)²=256
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