Question

ii) 10 + 2a – 5b – ba​

Answer 1

Simplify (i) – pqr (p2 + q2 + r2). (ii) (px + qy) (ax – by) ... (i) (3x + 7y) (3x – 7y). Since (a + b) (a – b) = a2 – b2, therefore. (3x + 7y) (3x – 7y) = (3x)2 – (7y)2. = 9x2 – 49y2. (ii). 4. 4. 3. 5. 4. 5. 4.