Evaluate 2x2 – 4y2 when x = 2 and y = – 3
Mathematics · Middle School · Tue Nov 03 2020
llm
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Given:
2x^2 - 4y^2
x = 2
y = -3
Evaluate.
Solution:
Substitute the given values of x and y to the equation.
= 2x^2 - 4y^2
= 2 (2)^2 - 4 (-3)^2
= 2 (4) - 4(9)
= 8 - 36
x = -28
Final answer:
x = -28