Question

Представь в виде многочлена выражение: (х + 14)2 – (х – 8)(х + 8).
-260 – 287
260
287 - 260
282 + 132
287 + 260​

Answer 1

${(x + 14)}^{2} - (x - 8)(x + 8) = {x}^{2} + 2 + \times x \times 14 + {14}^{2} - ( {x}^{2} + 8x - 8x - {8}^{2} ) = {x}^{2} + 28x + 196 - ( {x}^{2} - 64) = {x}^{2} + 28x + 196 - {x}^{2} + 64 = 28x + 260$