Question

evaluate:30square-evaluate 301 square - 300 square.(use identity)​

Answer 1

Answer:

900

601

Step-by-step explanation:

30²

=(20+10)²

by using Identity (a+b)²=a²+b²+2ab

=20²+10²+2(20)(10)

=400+100+400

=900

301²-300²

by using Identity a²-b²=(a+b)(a-b)

=(301+300)(301-300)

=601×1

=601