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juin [17]
3 years ago
5

When adding integers with the same sign, you ___ the numbers and ____ the sign.

Mathematics
1 answer:
fredd [130]3 years ago
8 0

(I)

we are given when we add numbers of same sign

For exp: +2+3=+5

-2-3=-5

We can see that we are adding numbers and then we put same sign in front

so, we can fill spaces

When adding integers with the same sign, you add the numbers and put the sign

(II)

we are given when we add numbers of different signs

For exp: 2-3=-1

-2+3=+1

We can see that we are subtracting numbers and then we put sign of largest value in front

so, we can fill spaces

When adding integers with different signs you subtract the numbers and use the sign of the largest absolute value

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Use the quadratic formula to solve the equation <br> 25x^2-30x+25=0
Reika [66]

Answer: x=\frac{3}{5}+i\frac{4}{5},\:x=\frac{3}{5}-i\frac{4}{5}

Step-by-step explanation:

25x^2-30x+25=0

x_{1,\:2}=\frac{-\left(-30\right)\pm \sqrt{\left(-30\right)^2-4\cdot \:25\cdot \:25}}{2\cdot \:25}

\sqrt{\left(-30\right)^2-4\cdot \:25\cdot \:25}

=\sqrt{30^2-4\cdot \:25\cdot \:25}

=\sqrt{30^2-2500}

=i\sqrt{2500-30^2}

=40i

x_{1,\:2}=\frac{-\left(-30\right)\pm \:40i}{2\cdot \:25}

x_1=\frac{-\left(-30\right)+40i}{2\cdot \:25},\:x_2=\frac{-\left(-30\right)-40i}{2\cdot \:25}

x=\frac{3}{5}+i\frac{4}{5},\:x=\frac{3}{5}-i\frac{4}{5}

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Step-by-step explanation:

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