Proof: if a ^ 2-B ^ 2-A + B is not equal to 0, then a is not equal to B

Proof: if a ^ 2-B ^ 2-A + B is not equal to 0, then a is not equal to B

a^2-b^2-a+b
=(a-b)(a+b)-(a-b)
=(a-b)(a+b-1)
If a ^ 2-B ^ 2-A + B is not equal to 0, that is, (a-b) (a + B-1) ≠ 0
Then A-B ≠ 0 and a + B-1 ≠ 0
Then A-B ≠ 0, that is, a ≠ B
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It is proved that 2 / 2 of (1 / A + 1 / b) is less than or equal to the following sign AB is less than or equal to a + B / 2 is less than or equal to the following sign a ^ 2 + B ^ 2 / 2

(a-b) & sup2; > = 0 leads to a & sup2; + B & sup2; > = 2Ab, so: A & sup2; + B & sup2 / / 2 > = AB radical a & sup2; + B & sup2 / / 2 > = AB radical
(a + b) / 2 > = radical ab
(1 / A + 1 / b) 2 = 2Ab / A + B

How much is a meter B = a + B multiplied by B to find 2 meters 3 meters 5?

2.3.5 meters
=[(2 + 3) × 3] M5
=15m5
=（15+5）×5
=100

How many centimeters is three meters and five centimeters

305 cm, please accept