subtract the second expression from the first expression
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Answer:
(i) a + 2b
(ii) 2x + 3y + 4z
(iii) - 4ab - 8b square
(iv) 4pq - 15p square - 2q square
(v) - 5x square + 3x + 11
(vi) 2x square - 2xy - 5y square
(vii) 3m cube - 7
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2
Answer:
(i) a-b-(2a+b)
=a-b-2a-b
=-a-2b
(ii) -x-y-3z-(x+2y+z)
= -x-y-3z-x-2y-z
= -2x-3y-4z
(iii) 3a²-4ab+6b²-(3a²-8ab-2b²)
= 3a²-4ab+6b²-3a²+8ab+2b²
= 8b²+4ab
(iv) 9p²-(4pq-6q²-2q²)
= 9p²-4pq+6q²+2q²
= 11p²-4pq+6q²
(v) 2x²-5x-3-(7-2x-3x²)
=2x²-5x-3-7+2x+3x²
=5x²-3x-10
(vi) 3x²-xy-2y²-(5x²-xy-2y²)
= 3x²-xy-2y²-5x²-xy-2y²
= 3x²-xy-2y²-5x²-xy-2y²
= -2x²-2xy-4y²
(vii) 3m³+4-(6m³+4m+7m-3)
= 3m³+4-6m³-11m+3
= -3m³-11m+7
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