Question

12.
(1) (2 - x)(2 + x)(4 + x^2)​

Answer 1

Answer:

$(16 - {x}^{4})$

Step-by-step explanation:

Given,

$(2 - x)(2 + x)(4 + {x}^{2}) \\ we \: know - (a - b)(a + b) = {a}^{2} - {b}^{2} \\ =( {2}^{2} - {x}^{2})(4 + {x}^{2}) \\ = (4 - {x}^{2} )(4 + {x}^{2}) \\ = ( {4 }^{ 2} - ({ {x}^{2} })^{2} ) \\ = (16 - {x}^{4})$

Answer 2

Answer:

16-x^2

Step-by-step explanation:

[(2-x) (2+x)] (4+x^2)

for

(2-x)(2+x)

4-x^2

for

[(2-x) (2+x)] (4+x^2)

(4-x^2) (4+x^2)

16-x^2