Question

4) Factorise completely : m4 -16
5) Solve the equation:
y - 3(y - 5) = 6 (y + 3)
please answer please

Answer 1

Step-by-step explanation:

(4)

$m4 - 16 \\ = 4(m - 4)$

(5)

$y - 3(y - 5) = 6(y + 3) \\ y - 3y + 15 = 6y + 18 \\ - 2y + 15 = 6y + 18 \\ 6y + 2y = 15 - 18 \\ 8y = - 3 \\ y = \frac{ - 3}{8}$