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Identify the terms, their coefficients for each of the following expressions:(i) 7x2yz – 5xy(ii) x2 + x + 1(iii) 3x2y2 – 5x2y2z2 + z2(iv) 9 – ab + bc – ca(v) a/2 + b/2 – ab(vi) 0.2x – 0.3xy + 0.5y |
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Answer» (i) 7x2yz – 5xy The given equation has two terms that are: 7x2yz and – 5xy The coefficient of 7x2yz is 7 The coefficient of – 5xy is – 5 (ii) x2 + x + 1 The given equation has three terms that are: x2, x, 1 The coefficient of x2 is 1 The coefficient of x is 1 The coefficient of 1 is 1 (iii) 3x2y2 – 5x2y2z2 + z2 The given equation has three terms that are: 3x2y, -5x2y2z2 and z2 The coefficient of 3x2y is 3 The coefficient of -5x2y2z2 is -5 The coefficient of z2 is 1 (iv) 9 – ab + bc – ca The given equation has four terms that are: 9, -ab, bc, -ca The coefficient of 9 is 9 The coefficient of -ab is -1 The coefficient of bc is 1 The coefficient of -ca is -1 (v) a/2 + b/2 – ab The given equation has three terms that are: a/2, b/2, -ab The coefficient of a/2 is 1/2 The coefficient of b/2 is 1/2 The coefficient of -ab is -1 (vi) 0.2x – 0.3xy + 0.5y The given equation has three terms that are: 0.2x, -0.3xy, 0.5y The coefficient of 0.2x is 0.2 The coefficient of -0.3xy is -0.3 The coefficient of 0.5y is 0.5 |
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