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3 years ago

Solve by factoring n^2+2n-15=0. With steps please.

Mathematics

1 answer:

VMariaS [17]3 years ago

7 0

$n^2+2n-15=0\\
n^2+5n-3n-15=0\\
n(n+5)-3(n+5)=0\\(n-3)(n+5)=0\\
n=3 \vee n=-5$

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Answer:

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Step-by-step explanation:

Given that:

Number of seed planted in each big pot = 9

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3 years ago

Omar can jog 3 2/5 miles in 2/3 of an hour. Find his average speed in miles per hour.

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3 years ago

Read 2 more answers

Help me please!! This is timed and I’m stuck

zhuklara [117]

Let's solve

$\\ \sf\longmapsto 2x^2+7x-15=0$

$\\ \sf\longmapsto x=\dfrac{-7\pm\sqrt{7^2-4(2)(-15)}}{2(2)}$

$\\ \sf\longmapsto x=\dfrac{-7\pm\sqrt{169}}{4}$

$\\ \sf\longmapsto x=\dfrac{-7\pm13}{4}$

$\\ \sf\longmapsto x=\dfrac{-7+13}{4}\:or \:\dfrac{-7-13}{4}$

$\\ \sf\longmapsto x=\dfrac{6}{4}\:or\:\dfrac{-20}{4}$

$\\ \sf\longmapsto x=\dfrac{3}{2}\:or -5$

Subtract

$\\ \sf\longmapsto 3/2-(-5)=3/2+5=13/2$

Option B

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago