Question

Resolve the following into factors: a² – 9b² – 12b – 4​

Answer 1

Answer:

Refer to the following:

Step-by-step explanation:

${a}^{2} - 9 {b}^{2} - 12b - 4 \\ = a {}^{2} - (9 {b}^{2} + 12b + 4) \\= {a}^{2} - (3b - 2) {}^{2} \\ =(a + 3b - 2)(a - 3b + 2).$