Question

please step by step answer​

Answer 1

Answer:

310 * 10 - 30 = 100 is the answer

Answer 2

Answer:

step by step

Step-by-step explanation:

8. (310)^2

(a+b)^2=a^2+2ab+b^2

(300+10)^2

300^2 + 2×300×10 +10^2

90000+6000+100

96100

9.(196)^2

(a-b)^2=a^2-2ab+b^2

100^2-2×100×96+96^2

10000-19200+9016

-9200+9016

-184