alisewashington5 alisewashington5
  • 13-01-2020
  • Mathematics
contestada


[tex](2x + 7) {?}^{2} [/tex]
​

Respuesta :

ghanami
ghanami ghanami
  • 13-01-2020

Answer:

Step-by-step explanation:

hello : by idetity : (a+b)² = a²+b²+2ab

in this exercice : a = 2x and b = 7

(2x+7)² =(2x)²+7²+2(2x)(7)

(2x+7)² =4x² +28x +49

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