Question

Q.1) Expand.

1. (x-2)²
Options:- 1) x³-6x²+12x-8
2) x³+6x²-12x-8
3) x³-6x³+12x+8

2. (p+8)(p-3)
Options:- 1)p²+5p-24
2) p²-5p+24
3) p²+5p+5​

Answer 1

Answer:

1. x³ - 6x² + 12x - 8
2. p² + 5p + 5

हे वरील पश्नाचे उत्तरे आहेत .

Answer 2

Answer :-

1) x³-6x²+12x-8 is correct option.

2) p²+5p-24 is correct option.

Explanation :-

$1) \: \: {(x - 2)}^{3}$

$by \: using \: the \: identity$

${(a - b)}^{ 3 } = {a}^{3} - {b}^{3} - 3 {a}^{2} b + 3a {b}^{2}$

${(x - 2)}^{3} = {x}^{3} - 6 {x}^{2} + 12x - 8$

So , option 1) is correct

$2) \: (p + 8)(p - 3)$

$by \: solving...$

${p}^{2} - 3p + 8p - 24$

${p}^{2} + 5p - 24$

So , option 1) is correct