Question

3: (X+A) (X+B)
4: (A+B) (A-B)

please answer this..

Answer 1

Step-by-step explanation:

(X+A)(X+B) = X(X+B) + A(X+B)

= X² + BX + AX + AB

= X² + (A+B)X + AB

(A+B)(A-B) = A(A-B) + B(A-B)

= A² - AB + AB - B²

= A² - B²

HOPE IT HELPS YOU