Question

How do you factor the polynomial r²-16?​

Answer 1

Step-by-step explanation:

$identity \: used \: = \: {a}^{2} - {b}^{2} = (a - b)(a + b) \\ r {}^{2} - 16 \\ =( {r})^{2} - (4) ^{2} \\ = (r - 4)(r + 4)$

Answer 2

Answer:

Step-by-step explanation:

$identity \: used \: = \: {a}^{2} - {b}^{2} = (a - b)(a + b) \\ r {}^{2} - 16 \\ =( {r})^{2} - (4) ^{2} \\ = (r - 4)(r + 4)$