Question

a)  7² + 2 . [ (3 + 1)² - 4 . 1³ ]

Answer 1

$7^2 + 2 \cdot [(3 + 1)^2 - 4 \cdot 1^3] \\\\ 49 + 2 \cdot [(4)^2 - 4 \cdot 1] \\\\ 49 + 2 \cdot [16 - 4] \\\\ 49 + 2 \cdot 12 \\\\ 49 + 24 = \boxed{73}$

Answer 2

7² + 2 . [ (3 + 1)² - 4 . 1³ ]

49 + 2..[ 14 - 4]
49+ 2.10
 49+ 20
  
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