which of the following is the difference when 2x²-5x-1 is subtracted frim 7x²-4x+8?
a. 5x²+x+9
b.5x²-9+7
c.5x²+x-7
d.5x²-x-7
a. 5x²+x+9
b.5x²-9+7
c.5x²+x-7
d.5x²-x-7
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Answer:
which of the following is the difference when 2x²-5x-1 is subtracted frim 7x²-4x+8?
a. 5x²+x+9
b.5x²-9+7
c.5x²+x-7
d.5x²-x-7
answer
b.5x²-9+7
Answer:
b. -5x²-9+7
Step-by-step explanation:
2x²-5x-1-7x²-4x+8= -5x²-9+7
Group like terms
= 2x²-7x²-5x-4x-1+8
Add similar elements: 2x²-7x²= -5x²
= -5x²-5x-4x-1+8
Add similar elements: -5x-4x= -9x
= -5x²-9x-1+8
Add/Subtract the numbers: -1+8= 7
= 5x²-9+7
(Hope it helps :D, #CarryOnLearning!!)