Question

if 2 X + 3 Y is equals to 8 and x y is equals to Y then find the value of 4 x square + 9 y square​

Answer 1

Answer:

40

Step-by-step explanation:

2x+3y=8--------(1)

4x^2+9y^2-----------(2)

xy=y-----------(3)

x=y/y

x=1---------(4)

substitute (4) into (1)

2(1) + 3y = 8

2 + 3y = 8

3y = 8-2

3y = 6

y= 6/3

y = 2----------(5)

substitute (4) and (5) into (2)

=4(1)^2 + 9(2)^2

= 4(1) + 9(4)

=4+36

= 40.