Question

Pleaseee answer this question , I will mark brainliest , pleaseee

Answer 1

Answer:

35

Step-by-step explanation:

(a+b)² = a²+b²+2ab

by substitutng the given values

(7)² = a²+b²+2*6

49 = a²+b² +12

a²+b² = 49-12 = 37

(a-b)² = a² + b² - 2ab

         = 37 - 12 = 25

a-b = 5

a²-b² = (a+b)(a-b)

substitute the values

7*5 = 35

Mark me as the brainliest my friend Thnaku