Question

(vii) -6x? + 7y2 + (--8z?) + 2xyz + 3x2 + 8y2 - 2z² + 7xyz
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- -4a? + 5a - 6 - 2 + 2a - 1
wa_5a2 + 72 - 7
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Let Us Practise 5.2
1. Combine like terms and simplify.
21x - 7+ 2y - 3y + 17x
(int x'y-7x'y + 2xy + 3x'y + 8x’y - xy
(v) (x2 + 70x - 19) - (x2-y + 7) + (3 – x2)
(ii) 7x2 + 8y? - 2xyz + 7y2 - 3x2 + 4xyz
(iv) 7x + 2y - z-(x + 2y + 3z) - (y - 32)
Voi) 3x – 2y - xy - (x - y + xy) + 3xy + y-
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(in) x - Syz, 3x2 + 2, 2 - 2x
(iv) a + b -3, 6-a +3, a - b +3
(viii) (7y-y-2) - (3y² + 2y + 8)
2. Add the algebraic expressions.
0 3xy - 7yz, 2xy + 2yz
(ii) -7xy + 3, 8yz + xy + 2, 3xy + 2
(v) 14x+10y - 12xy - 13, 18 - 7x - 10y + 8xy, 4xy
(vi) 5m-71, 3n - 4m +2,2m - 3mn -5
(vii) 3x + 3x2 - 4x + 5, x3 - 2x2 + x - 4
(x) 3x*y* - 8xy +6,-10x’y +1,5 + 9xy + xy2
(vii) 4x’y, -3xy?, -5xy?, 5x'y
(ix) x - y - 1. y + z2 - x2, 2x2 + y2 +z2-17​

Answer 1

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