\(2+4\cdot7+2\)
\(=2+2\cdot2\cdot7+2\)
\(=2\cdot\left(1+2\cdot7+1\right)\)
\(=2\cdot\left(1+14+1\right)\)
\(=2\cdot16\)
\(=32\)
2 + 4 x 7 + 2 = 2 + 28 +2
= 30 + 2
= 32
2 + 4 x 7 + 2 = 2 + ( 4 x 7 ) +2
= 2 + 28 +2
= 32
2 + 4 x 7 + 2
= 2 + 28 + 2
= 30 + 2
= 32
Tk nha!! Mình kb rồi .