'ind the value of the following:
a) 9x2+ 49 y2 + 42xy, when x = 3 and y = 1
b) 25x2 +64 y2 – 80xy, when x = 4 and y = 2
1) If 2x + 3y = 8 and xy = 2, then find the value of 4x2 +9y2.
b) If 3x – 7 y = 8 and xy = -1 then find the value of 9x2 + 49 y2.
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0
Answer:
\huge\mathcal{Answer \ :-}Answer :−
\mathsf{Given \ :-}Given :−
\mathsf\red{9x^2 + 49y^2 \ = \ 42xy}9x
2
+49y
2
= 42xy
\mathsf{x \ = \ 15 \ And \ y \ = \ 3}x = 15 And y = 3
\mathsf{Putting \ values, \ we \ get}Putting values, we get
\mathsf{9(15)^2 + 49(3)^2 \ = \ 42(15)(3)}9(15)
2
+49(3)
2
= 42(15)(3)
\mathsf{2025 + 441 \ = \ 1890}2025+441 = 1890
\mathsf{= \ 576}= 576
\mathsf\green{The \ Correct \ Option \ is \ (B).}The Correct Option is (B).
\huge\mathbb{Hope \ this \ helps.}Hope this helps.
Answered by
0
Answer:
(a) 18 + 49 + 126 = 19
(b) 50 + 256 - 640 = - 334
(c)
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