3 years ago

-7t^2 – 2t + 9 = 0 pls solve using any method!

1 answer:

Aneli [31]3 years ago

8 0

$-7t^2 - 2t + 9 = 0\\
-7t^2+7t-9t+9=0\\
-7t(t-1)-9(t-1)=0\\
-(7t+9)(t-1)=0\\
t=-\dfrac{9}{7} \vee t=1$

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