Math, asked by NATIONALENVIROCLEAN, 10 months ago

If (2x-3y)=10&XY=8 then find value of 4x²+9y²

Answers

Answered by pulkit1dubey
3

Step-by-step explanation:

2x-3y=10 (squaring both side)

4x^2+9y^2-12xy=100

4x^2+9y^2=100+12(8)

4x^2+9y^2=196.ans.

Answered by sony7548
8

Step-by-step explanation:

(2x-3y) =10,xy=8

(2x-3y)²=(10)²

so, it is in the form of(a-b)²=a²+b²-2ab

(2x) ²+(3y) ²-2(2x)(3y) =100

4x²+9y²-12xy=100

4x²+9y²-12(8)=100

4x²+9y²-96=100

4x²+9y²=196

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