Question

Please answer me ok ok fast it's very urgent pls help​

Answer 1

Answer:

1. (X+4)(X-4) 2. X^2 + 6X + 9 3.A^2 - 6A + 9

Step-by-step explanation:

Answer 2

Step-by-step explanation:

1)

$\\ x {}^{2} - 16 = ((x {})^{2} - (4 {})^{2} ) \\ \\ = (x - 4)(x + 4) \\ i \: have \: use \: the \: formula \: given \: below \\ \\ \: \: (a {}^{2} - b {}^{2} ) = (a - b)(a + b)$

2)

$( {x + 3})^{2} = x {}^{2} + 2(x)(3) + {3}^{2} \\ = {x}^{2} + 6x + 9 \\ i \: have \: use \: the \: formula \: given \: below \\ (x + y) {}^{2} = x {}^{2} + 2(x)(y )+ {y}^{2}$

3)

$\\ (a - 3) {}^{2} = ( {a})^{2} - 2(a)(3) + ({3})^{2} \\ \\ = a {}^{2} - 6a + 9 \\ \\ i \: have \: use \: the \: formula \: given \: below \\ \\ ( {x - y})^{2} = {x}^{2} - 2(x)(y) + {y}^{2}$