x² - 14x + 45 = 0
Look for two numbers whose sum is -14 and product equal 45
Replace -14x by the numbers
x² - 9x - 5x + 45 = 0
x(x - 9) - 5 ( x - 9) = 0
(x - 9) (x-5) = 0
Either
x - 9 = 0 or x - 5 = 0
x = 9 or x = 5
Hence the correct answer is b.
1.6m questions
2.0m answers