Question

Evaluate x²y + y²
x
when x = 5 and y = -2

Answer 1

-30

Explanation:

x²y + y²x

substitute all the xs for 5s and all the ys for -2s

5²-2 + -2²5

x²y = x² times y

We can solve this equation now, breaking it up.

5² = 25

25 x -2 = -50

-50 + (-2² x 5)

-2² = 4

4x5 = 20

-50 + 20 = -30

Hope this makes sense!

- profparis

Answer 2

-30

Explanation:

x²y + y²x

Let x = 5 and y = -2

5²(-2) + (-2)²(5)

Using PEMDAS, we evaluate exponents first

(25)(-2) + 4(5)

Now we multiply

-50 +20

Finally we can add and subtract

-30