Question

40. (a - b)2 – (c - d)2 =​

Answer 1

Answer:

a²+b²-c²-d²-2(ab-cd)

Step-by-step explanation:

= (a²+b²-2ab) - (c²+d²-2cd)

= a²+b²-2ab-c²-d²+2cd

= a²+b²-c²-d²-2(ab-cd)

Answer 2

Answer:

1)

${a}^{2} + {b}^{2} - 2ab$

2)

${c}^{2} + {d}^{2} - 2cd$

solution