Re
3.5 ² = 12.25
3 x 4 + 0.25 = 12 + 0.25 = 12.25
7.5 ² = 7 x 8 + 0.25 = 56.25
( x + 0.5)² = x² + x + 0.25 = x ( x + 1 ) + 0.25
10.5 ²
= x ( x + 1) + 0.25
= 10 ( 10 + 1 ) + 0.25 = 10 * 11 + 0.25
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Re
3.5 ² = 12.25
3 x 4 + 0.25 = 12 + 0.25 = 12.25
7.5 ² = 7 x 8 + 0.25 = 56.25
( x + 0.5)² = x² + x + 0.25 = x ( x + 1 ) + 0.25
10.5 ²
= x ( x + 1) + 0.25
= 10 ( 10 + 1 ) + 0.25 = 10 * 11 + 0.25