Solve the following:
113 × 87 = ?
Answer & explanation
Correct answer: option 1
113 × 87 = ?
a2 - b2 = (a + b) (a – b)
= (100 + 13) (100 – 13)
= 1002 - 132
= 10000 – 169
= 9831
Solve the following:
113 × 87 = ?
Correct answer: option 1
113 × 87 = ?
a2 - b2 = (a + b) (a – b)
= (100 + 13) (100 – 13)
= 1002 - 132
= 10000 – 169
= 9831