Question

if x is equal to 2 and Y is equal to minus 2 then find the value of 7 x square - 3 X Y + 5 y square​

Answer 1

Answer:

Step-by-step explanation:

x = 2, y = -2

7x^2 - 3xy + 5y^2

= 7(2)^2 - 3(2)(-2) + 5(-2)^2

= 7(4) +3(4) +5(4)

= 60

Answer 2

Step-by-step explanation:

If X is equal to 2 then,

X=2

If y is equal to -2 then,

y=-2

=7x*x-3xy+5y

=7*2*2-3*2*(-2)+5*(-2)

=28+12-10

=40-10

=10 ans