Question

Вычисли: 62,8^2−62,7^2

Answer 1

62,8:2-62,7:2=32,4-31,35=1,05
Ответь:1,05

Answer 2

62,8²-62,7²=(62,8-62,7)*(62,8+62,7)=0,1*125,5=12,55.

(d¹⁰+m¹⁰)²-(d¹⁰-m¹⁰)²-d²m²=

d²⁰+2d¹⁰m¹⁰+m²⁰-d²⁰+2d¹⁰m¹⁰-m²⁰-d²m²=

4d¹⁰m¹⁰-d²m²=d²m²*(4d⁸m⁸-1)=

=d²m²*(2d⁴m⁴-1)*(2d⁴m⁴+1)=

=d²m²*(√2d²m²-1)*(√2*d²m²+1)*(2d⁴m⁴+1)=

=d²m²*(⁴√2*dm-1)*(⁴√2*dm+1)*(√2*d²m²+1)*(2d⁴m⁴+1).