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3 years ago

13

2x-5Y=16 X+4Y=-5 solve

1 answer:

Andreyy893 years ago

6 0

1. x= 5/2y+8

2. x=−4y−5

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X²+x-6=0<br><br>hãy tìm giá trị của x trong câu trên

Gennadij [26K]

Tìm giá trị của x :

${x}^{2} + x - 6 = 0$

$x {}^{2} + 3x - 2x - 6 = 0$

$x(x + 3) - 2(x + 3) = 0$

$(x + 3)(x - 2) = 0$

Bây giờ, có hai trường hợp :

Trường hợp 1. khi nào x + 3 = 0

x = -3

Trường hợp 2. khi nào x - 2 = 0

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2 years ago

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Step-by-step explanation:

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3 years ago

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Step-by-step explanation:

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4 years ago

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monitta

Answer:

153/20

Step-by-step explanation:

I assume you're asking

$2 \frac{1}{4} \times 3 \frac{2}{5}$

So

$\frac{9}{4} \times \frac{17}{5}$

=

$\frac{153}{20}$

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3 years ago