Question

MODEL II
3. Simplify these expressions and find their values if x = 3, a = -1, b = -2
(i)a²+b²-x²+ab-3ax​

Answer 1

Answer:

ax - a² + bx - b² = 2( x² - ax - bx + ab). ax - a² + bx - b² = 2x² - 2ax - 2bx + 2ab. 3ax - a² + 3bx - b² = 2x² + 2ab. 3ax - a² + 3bx - b² - 2x ² - 2ab = 0. 3ax