Marissa subtracted a negative number from a positive number. Her result was negative. Is that reasonable

Mathematics

2 answers:

zhenek [66]3 years ago

8 0

Answer:

No.

Step-by-step explanation:

Because it is a double negative, the difference will become positive.

For instance, 6 - (-4) = 10

(The subtraction and negative signs will become positive instead).

pshichka [43]3 years ago

6 0

Answer:

the result is a positive number not a negative number

Step-by-step explanation:

a - ( -b)

We know that subtracting a negative is like adding

a+b

This would result in a positive number

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Solve this using the quadratic formula. Show work<br><br> 2x^2+7x−5=0

kozerog [31]

Multiply the numbers (2*2=4)
$=\frac{-7+\sqrt{7^2-4\cdot \:2\left(-5\right)}}{2\cdot \:2}$

Apply the rule
$\sqrt{7^2+2\cdot \:4\cdot \:5}$

7^2 =49
$=\sqrt{49+2\cdot \:4\cdot \:5}$

Multiply
$\sqrt{49+40}$

Add
$\sqrt{89}$

$=\frac{-7-\sqrt{89}}{4}$

Final solution:
$x=\frac{-7+\sqrt{89}}{4},\:x=\frac{-7-\sqrt{89}}{4}$

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RSB [31]

SOLUTION

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