Question

Tính nhanh:

A= 85²+170 x 15 + 225

Ai nhanh mình k cho

Answer 1

A = 85^2 + 170.15 + 225;
=85^2+2.85.15+15^2
=(85+15)^2
=100^2
=10000

Answer 2

A= 85²+170 x 15 + 225

A=7225+225+2550

A=7450+2550

A=10000

Answer 3

A=85^2+170*15+225

A=7225+170*15+225

A=7225+2550+225

A=9775+225

A=10000