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3 years ago

Wat is 7x² + 4x - 5= 0

Mathematics

2 answers:

lara [203]3 years ago

5 0

$7x^2+4x-5=0\\
\Delta=4^2-4\cdot7\cdot(-5)=16+140=156\\
\sqrt{\Delta}=\sqrt{156}=2\sqrt{39}\\
x=\dfrac{-4\pm2\sqrt{39}}{2\cdot7}=\dfrac{-2\pm\sqrt{39}}{7}$

frosja888 [35]3 years ago

4 0

Answer and workings in the attachment below.

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3 years ago

Given the following information, determine if one of the brands is a better buy. Brand A: 14 ounces for $44. 66 Brand B: 20 ounc

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Division is one of the basic mathematical operations. The cost of Brand A and B is the same.

<h3>What is division?</h3>

The division is one of the most basic arithmetic operations. It is used to find the number of times a number is been added to itself.

Given to us

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To compare the two brands we will find the cost of one ounce for each brand.

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Learn more about Division:

brainly.com/question/369266

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