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vagabundo [1.1K]

2 years ago

11

21z^2+85z-26=0 Please solve using factoring

1 answer:

const2013 [10]2 years ago

7 0

Trial and error
either
(z )(21z )
(3z )(7z )
and ending with
( -1)( 26)
( -26)( 1)
( -2)( 13)
( 2)( -13)
trial enderor

after some times
(3x+13)(7x-2)=0

set to zero
3x+13=0
3x=-13
x=-13/3

7x-2=0
7x=2
x=2/7

x=-13/3 or 2/7
it would be easier to use quadratic formula though

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<h3><u>7. Ans ;</u></h3>

$\frac{41}{3} < 14 < \sqrt{200}$

<h3><u>8</u><u>.</u><u> </u><u>Ans</u><u> </u><u>;</u></h3>

<u> $0.6 < \frac{2}{3} < \sqrt{ \frac{9}{16} }$ </u>

Step-by-step explanation:

<h3><u>7. Ans ;</u></h3>

$\sqrt{200} = 10 \sqrt{2} = 14.1 \\ 14 = 14 \\ \frac{41}{3} = 13.6$

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<h3><u>8. Ans ;</u></h3>

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I hope I helped you^_^

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