Question

Solve it with suitable identities​

Answer 1

Answer:

I will solve only 1st ok

Step-by-step explanation:

(58)²

:-(60-2)²

:-(60-2)(60-2)

:-60²-120-120+2²

:-3600-240+4

:-3360+4

:-3364

Answer 2

Step-by-step explanation:

a. 58²= (60-2)²

using identity (a-b)² = a² + b² - 2ab

(60-2)² = 60² + 2² - 2(60)(2)

            =3600 + 4 - 240

            =3364

b.  72² = (70+2)²

using identity (a+b)² =a²+b²=2ab

(70+2)² = 70² + 2² + 2(70)(2)

            =4900+4+280

            =5184

c. 99² = (100-1)²

using identity (a-b)²=a²+b²-2ab

(100-1)²= 100²+1²-2(100)(1)

           =10000+1-200

           =9801

d. 101² = (100+1)²

using identity (a+b)²=a²+b²+2ab

(100+1)² = 100²+1²+2(100)(1)

             =10000+1+200

             =10201

hope it helps

please mark as brainliest