Find the cost of painting rectangular blackboard of length 3m and breadth 2m Cost painting is Rs 10/m.
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Find the cost of painting rectangular blackboard of length 3m and breadth 2m Cost painting is Rs 10/m.
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Answer:
hi how are you Anjel
Step-by-step explanation:
= Length of rectangular = 3m
breadth = 2m
Area = l×b
= 3m × 2m
=6m^2
cost of painting =Rs.10×6
=Rs.60
Verified answer
Answer:
To find the square root of the given polynomial x 4−10x3+37x2−60x+36, we must equate it to the general form of equation that is (ax 2+bx+c) as shown below:
x4-10x 3+37x 2−60x+36
=ax+bx+c
⇒(x4−10x 3+37x 2−60x+36)2
=(ax 2+bx+c) 2
⇒x4−10x3+37x 2 −60x+36=(ax 2 +bx+c)2
⇒x 4 −10x 3 +37x 2 −60x+36=(ax 2 ) 2+(bx) 2 +(c) 2 +(2×ax 2 ×bx)+(2×bx×c+(2×c×ax 2 )(∵(a+b+c) 2
=a 2 +b 2 +c 2+2ab+2bc+2ca)
⇒x 4 −10x 3+37x 2 −60x+36=a 2 x 4 +b2+c 2 +2abx 3 +2bcx+2acx 2
Now, comparing the coefficients, we get:
a 2 =1,b 2 +2ac
=37,c 2
=36,2ab
=−10,2bc
=−60
a2 =1
⇒a=1
c2=36
⇒c=6
2ab=−10
⇒2×1×b=−10
⇒2b=−10
⇒b=−5
Therefore, a=1,b=−5,c=6 and substituting the values in the equation (ax2+bx+c), we get x2−5x+6.
Hence, the square root of x4−10x3+37x 2−60x+36 is ∣∣∣
(x2−5x+6) ∣∣∣.
Step-by-step explanation:
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