Please solve Q2 and Q3 with their parts given above.. Chapter- Algebraic expressions.. No CDT answers allowed..It would be appreciated if you help..and in Q2 3rd part the terms are ending with abc. Please Help.
Answers
Step-by-step explanation:
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Answer:
2. (a)3x, -5x, 7x
=3x + (-5x) + 7x
=3x - 5x + 7x
=5x Ans.
(b)7xy, 2xy, -8xy
=7xy + 2xy + (-8xy)
=7xy + 2xy - 8xy
=xy Ans.
(c)-2abc, 3abc, abc
=(-2abc) + 3abc + abc
=-2abc + 3abc + abc
=2abc Ans.
(d)3mn, -5mn, 8mn, -4mn
=3mn + (-5mn) + 8mn + (-4mn)
=3mn - 5mn + 8mn - 4mn
=-2mn + 4mn
=6mn Ans.
(e)2x³, 3x³, -4x³, -5x³
=2x³ + 3x³ + (-4x³) + (-5x³)
=2x³ + 3x³ - 4x³ - 5x³
=5x³ - 9x³
= -4x³ Ans.
3.(a)21b - 32 + 7b - 20b
=21b - 20b + 7b - 32
=8b - 32 Ans.
(b)12m² - 9m + 5m - 4m² - 7m + 10
=12m² - 4m² - 9m - 7m + 5m + 10
=8m² + 7m² + 10 Ans.
(c)-z² + 13z² - 5z + 7z³ - 15z
=-z² + 13z² - 5z - 15z + 7z³
=12z² - 20z + 7z³ Ans.
(d)5x²y - 5x² + 3yx² - 3y² + x² - y² + 8xy² - 3y²
=5x²y - 5x² + x² + 3yx² - 3y² - y² - 3y² + 8xy²
=5x²y - 4x² + 3yx² - 7y² + 8xy² Ans.
(e)p - (p - q) - (q - p) - q
=p - p + q - q + p - q
=p - q Ans.
Step-by-step explanation:
Hope this helps you...