Question

plz someone help me with 1st question​

Answer 1

Answer:

x=+9

Step-by-step explanation:

Answer 2

Answer:

$x^{2} - 15x + 54\\x^{2} -(6+9)x + 54\\x^{2} -6x-9x+54\\x(x-6)-9(x-6)\\(x-9)(x-6)\\x=9\\x=6$