Question

find the value of 25 x square 16 Y squared minus 40 x y when x is equal to 6 and Y is equal to 7

Answer 1

Answer:

The value of 25x

2

+16y

2

+40xy at x=1 and y=−1 is

25(1)

2

+16(−1)

2

+40(1)(−1)

⇒25+16−40

⇒1