Question

find the value of 18²-17² 27²-28² 37²-36² 55²-54² ​

Answer 1

Step-by-step explanation:

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

18^2-17^2=(18+17)(18-17)

=35(1)=35

27^2-28^2=(27+28)(27-28)

=55(-1)= -55

37^2-36^2=(37+36)(37-36)

=73(1)=73

55^2-54^2=(55+54)(55-54)

=109(1)=109