Question

9. Evaluate: (x - 2)(x+ 2) (x + 4)​

Answer 1

Step-by-step explanation:x cube + 8 x square + 12 x - 16

Answer 2

$\huge{\mathbf{ \overbrace{ \underbrace{ \pink{ \fbox{ \green{ \blue{S} \pink{o} \red{l} \green{u} \purple{t} \blue{i} \green{o} \red{n}}}}}}}}$

$\bf{(i) \: (x - 2)(x + 2)(x + 4)} \\ \blue { \tt{[We \: know \: that ,\: {a}^{2} - {b}^{2} = (a + b)(a - b) ]}} \\ = \bf{( {x}^{2} - {2}^{2})(x + 4) } \\ = \bf{( {x}^{2} - 4)(x + 4) } \\ = \bf{ {x}^{3} + 4 {x}^{2} - 4x - 16 }$