Question

solve this

Q. (x - 4)(x - 5)

(a) x2 + x + 20

(b) x2 - 9x + 20

(c) x2 + 9x - 20
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Answer 1

Answer:

x² - 9x + 20

Step-by-step explanation:

(x - 4)(x - 5)

⇒ x² - 4x - 5x + 20

⇒ x² - 9x + 20

Hence, the answer is x² - 9x + 20.

Answer 2

x2 +(-4-5)x+(-4)(-5)

x2-9x+20