Question

15. The common root of the quadratic equations x2 – 3x + 2 = 0 and 2x2-5x+2=0 is
a)2
b)1
c)-2
d)1/2​

Answer 1

Answer:

-1 is the common root

Step-by-step explanation:

$let \: x \: be \: \alpha$

then

$\alpha {}^{2} - 3 \alpha + 2 = 0 \times 2$

$2 \alpha {}^{2} - 5 \alpha + 2 = 0$

by solving we get

$2 \alpha + 2 = 0$

$\alpha = - 1$

so -1 is the common root

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Answer 2

Answer:

a=-1

Step-by-step explanation:

A= -1 is the right answer