Question

simplify the following using ruler identities

69²-59²​

Answer 1

Answer:

The answer is 8242

Step-by-step explanation:

• 69 ^ 2 = 4761
• - 59 ^ 2 = 3481
• 4761 + 3481
• 8242

Answer 2

Step-by-step explanation:

(69)^2 - (79)^2

(70 -1 )^2 - (60 -1 )^2

(70)^2+(1)^2-2×70×1 - (60)^2+(1)^2-2×60×1

4900+1-140 -3600+1-120

4901-140-3720+1

4761 - 3719

1042