Question

(a - b)x+ (a + b)y = d- 2ab - 62
(a+b) (x + y) = a² + b2​

Answer 1

Use the property of quadratic equations. {x+y = -b/a , xy = c/a}; x*1/x = r/p. 1 = r/p ... by (x+1) x+1) 3x3+kx2+5x-6 (3x2+(k-3) x+(8-k) ..... Now , (a + b)2 = a2 + b2 + 2ab => (a + b ...