Question

factorise a square minus 4 A + 3 + 2 b minus b square​

Answer 1

Answer:

A² -4a + 3 +2b - b²

= a² - 4a + 4 - 1 + 2b - b²

= (a - 2)² - { b² -2b +1 }

= (a -2)² - (b -1)²

[ use, formula, x² - y² = (x - y)(x + y) ]

=(a -2 - b +1 )(a -2 + b -1)

=(a - b -1)(a + b -3)