Question

find the value of ( 6.968) ² - ( 3.032) ² / 3.936 using standard identities ​

Answer 1

Answer:

10

Step-by-step explanation:

(6.968)² - (3.032)² / 3.936

= (6.968 + 3.032) × (6.968 - 3.032) / 3.936    { a² - b² = (a + b) × (a - b) }

= 10 × 3.936 / 3.936

= 10

Hope that helps you...☺

Answer 2

Answer

Given, (a+2b)2.

We know, (x+y)2=x2+2xy+y2.

Then,

(a+2b)2

=a2+(2b)2+2×a×2b

=a2+4b2+4ab.

Therefore, option C is correct.