Question

find the value of 1)18²-17² 2)18²-27² 3)37²-36² 4)55²-54²​

Answer 1

Answer:

1)35

2)-405

3)73

4)109

Step-by-step explanation:

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

1)18²-17²=(18+17)(18-17)

=35(1)=35

2)18²-27²=(18+27)(18-27)

=45(-9)= -405

3)37²-36²=(37+36)(37-36)

=73(1)=73

4)55²-54²=(55+54)(55-54)

=109(1)=109