Question

[trang anh]

Tính giá trị biểu thức:

a) ( 532 × 7 - 266 × 14) × ( 532 × 7 + 266)

b) 117 × ( 36 + 62) - 17 × ( 62 + 36)

c) ( 145 × 99 + 145) - ( 143 × 101 - 143)

Answer 1

[KIM TAEHYUNG]

a, ( 532 x 7 - 266 x 14 ) x ( 532 x 7 + 266 ) 

= 3724 - 3714 x 3724 + 266

= 0 x 3990

= 0

Answer 2

[KIM TAEHYUNG]

b, 117 x ( 36 + 62 ) - 17 x ( 62 + 36 )

= 117 x 98 - 17 x 98 

= 11466 - 1666

= 9800