Question

найди значение выражения 4x²+4x+1 при x=14.5​

Answer 1

4x²+4x+1=4(14,5)²+4(14,5)+1=4(210,25)+(58)+1=841+58+1=900

Answer 2

$\displaystyle\bf\\4x^{2} +4x+1=(2x+1)^{2} \\\\x=14,5\\\\\Big(2x+1\Big)^{2} =\Big(2\cdot 14,5+1\Big)^{2}=(29+1)^{2} =30^{2} =900$