Question

If, x = 2 and y² = 4

then
x² - y² ÷ x × y² = ??

Answer 1

ok but how ?

Answer 2

substitute

Answer 3

wouldn't it be -4 via pemdas??

x² - y² ÷ x × y² = ??
2² - 4 / 2 x 4
2² - 2 x 4
4 - 8 = -4?

Answer 4

You're right

Answer 5

x² - y² ÷ x × y²
First replace the variables with the known values:
2^2 - 4 ÷ 2 x 4
Now do exponents first:
4 - 4 ÷ 2 x 4
Then multiplications and divisions in the order they appear from left to right:
4 - 2 x 4
4 - 8
Finally do the subtraction:
-4

Answer 6

...ok