Question

If 3x+2y=9 andxy=4,find yhe value of 9x^+4y^.​

Answer 1

Answer:

33 = 9x^2 + 4y^2

Step-by-step explanation:

using the formula- (a + b) = a^2 + b^2 + 2ab

(3x + 2y)2 = 9x^2 + 4y^2 + 12xy

(9)2 = 9x^2 + 4y^2 + (12 * 4)

81 = 9x^2 + 4y62 + 48

81-48 = 9x^2 + 4y^2

33 = 9x^2 + 4y^2

Hope this helps:)