Question

Please solve all properly step by step

Answer 1

Answer:

1.i)we know the formula (a+b)²-(a-b) ²=4ab

so 4(a/2b*2b/a)-4=4-4=0

ii) 4(4a*3b)+48ab

48ab+48ab=96ab

Answer 2

Answer:

2) use (a+b)²-4ab = (a-b)²

put value ,

7²-4*10 = (a-b)²

(a-b) = √9 = ±3 (Ans)

3) use (a-b)² +4ab = (a+b)²

7²+18*4 = (a+b)²

(a+b) = √121 = ±(11) (Ans)