Evaluate : (i) (3x+12)(2x+13) (ii) (2a+0.5)(7a−0.3) (iii) (9−y)(7+

1.	Evaluate : (i) (3x+12)(2x+13) (ii) (2a+0.5)(7a−0.3) (iii) (9−y)(7+y) (iv) (2−z)(15−z) (v) (a2+5)(a2−3) (vi) (4−ab)(8+ab) (vii) (5xy−7)(7xy+9) (viii) (3a2−4b2)(8a2−3b2)
Answer» Evaluate : (i) $(3 x + \frac{1}{2}) (2 x + \frac{1}{3})$ (ii) $(2 a + 0.5) (7 a - 0.3)$ (iii) $(9 - y) (7 + y)$ (iv) $(2 - z) (15 - z)$ (v) $(a^{2} + 5) (a^{2} - 3)$ (vi) $(4 - a b) (8 + a b)$ (vii) $(5 x y - 7) (7 x y + 9)$ (viii) $(3 a^{2} - 4 b^{2}) (8 a^{2} - 3 b^{2})$

Evaluate : (i) (3x+12)(2x+13) (ii) (2a+0.5)(7a−0.3) (iii) (9−y)(7+y) (iv) (2−z)(15−z) (v) (a2+5)(a2−3) (vi) (4−ab)(8+ab) (vii) (5xy−7)(7xy+9) (viii) (3a2−4b2)(8a2−3b2)

Answer»

Evaluate :

(i) $(3 x + \frac{1}{2}) (2 x + \frac{1}{3})$

(ii) $(2 a + 0.5) (7 a - 0.3)$

(iii) $(9 - y) (7 + y)$

(iv) $(2 - z) (15 - z)$

(v) $(a^{2} + 5) (a^{2} - 3)$

(vi) $(4 - a b) (8 + a b)$

(vii) $(5 x y - 7) (7 x y + 9)$

(viii) $(3 a^{2} - 4 b^{2}) (8 a^{2} - 3 b^{2})$