How do you evaluate 2x ^ { 2} y if x = 2\frac { 1} { 2} ,y = - 3\frac { 3} { 5}?
2 Answers
Oct 4, 2017
Explanation:
You can evaluate
First, it's best to turn these fractions into improper fractions:
Subbing these into the expression we get:
These fractions can be further simplified before you multiply them together:
So in short,
Oct 4, 2017
Explanation:
"change the mixed numbers into "color(blue)"improper fractions"
rArr2 1/2=5/2" and "3 3/5=18/5
rArr2x^2y
=2xx(5/2)^2xx-18/5
=2xx25/4xx-18/5
color(blue)"cancel common factors " on numerators/denominators.
=cancel(2)^1xxcancel(25)^5/cancel(4)^2xx-18/cancel(5)^1
=1xx5/cancel(2)^1xx-cancel(18)^9/1
=1xx5xx-9=-45