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ivann1987 [24]
4 years ago
5

Solve x2 9x 20 = 0. x = 2, x = 10 x = −2, x = −10 x = −5, x = −4 x = 5, x = 4

Mathematics
2 answers:
nalin [4]4 years ago
8 0

Answer:

The correct option is 3.

Step-by-step explanation:

The given equation is

x^2+9x+20=0

Factorize the given equation.

x^2+5x+4x+20=0

x(x+5)+4(x+5)=0

(x+5)(x+4)=0

Equate each factor equal to zero.

x+5=0\Rightarrow x=-5

x+4=0\Rightarrow x=-4

The solutions of the given equation are x=-5 and x=-4. Therefore the correct option is 3.

Paul [167]4 years ago
7 0
X^2 + 9x + 20 = 0
(x + 4)(x + 5) = 0
x + 4 = 0 or x + 5 = 0
x = -4 or x = -5
x = -5, x = -4
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