Question

simplify (2x +7)²+(2x-7)²​

Answer 1

Step-by-step explanation:

$= \sf \: (2x + 7 {)}^{2} + {(2x - 7)}^{2} \\ \sf = \{ {(2x)}^{2} + 2(2x)(7) + {(7)}^{2} \} + \{ {(2x)}^{2} - 2(2x)(7) + {(7)}^{2} \} \\ \sf \: = \{ {4x}^{2} + 28x + 49 \} + \{ {4x}^{2} - 28x + 49\} \\ \: \sf \: = {4x}^{2} + 4 {x}^{2} + 28x - 28x + 49 + 49 \\ \sf \: = {8x}^{2} + 98 \: ans.$