Find the value of 4x square +25y square - 20xy for x=-4 and y=2
Answers
Answered by
1
Answer:
324
Step-by-step explanation:
x=-4. y=2
4x²+25y²-20xy
4×(-4)²+25×(2)²-20×(-4)(2)
4×16+25×4-20×-8
64+100-(-160)
64+100+160
=324
Similar questions