Respuesta :
Answer:
0
Step-by-step explanation:
Solve the equation x^2-9x+20=0. First, we need to factorise the equation on the left hand side, this can be done by finding two numbers that add together to make the 'b' coefficient (-9) and multiply to make the 'c' coefficient (20). This will give -5 and -4. Therefore, (x-5)(x-4)=0.
Answer:
x = 4, x = 5
Step-by-step explanation:
Given
x² - 9x + 20 = 0
Consider the factors of the constant term (+ 20) which sum to give the coefficient of the x- term (- 9)
The factors are - 4 and - 5, since
- 4 × - 5 = + 20 and - 4 - 5 = - 9, thus
(x - 4)(x - 5) = 0
Equate each factor to zero and solve for x
x - 4 = 0 ⇒ x = 4
x - 5 = 0 ⇒ x = 5
