3 years ago

Pzz look at this problem first person with correct answer will get branliest

Mathematics

1 answer:

galina1969 [7]3 years ago

4 0

Answer:

h, negative, negative

Step-by-step explanation:

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If a =3x^2+5x-6 and b =-2x^2 -6x+7 then A - B equals

gizmo_the_mogwai [7]

Answer:

$5x^2+11x-13$

Step-by-step explanation:

$a=3x^2+5x-6\\b=-2x^2-6x+7$

$a-b=(3x^2+5x-6)-(-2x^2-6x+7)=\\3x^2+5x-6+2x^2+6x-7=\\5x^2+11x-13$

Hope this helps!

3 0

4 years ago

Which are the solutions of x2 = –7x – 8?

vovangra [49]

Answer:

The solutions are:

$x_1=\frac{-7+\sqrt{17}}{2}$ $x_2=\frac{-7-\sqrt{17}}{2}$

Step-by-step explanation:

We have the following quadratic equation

$x^2 = -7x - 8$

We can rewrite the equation as follows

$x^2+7x + 8=0$

Now we use the quadratic formula to solve the equation

For an equation of the form $ax ^ 2 + bx + c = 0$ the quadratic formula is:

$x=\frac{-b\±\sqrt{b^2-4ac}}{2a}$

In this case:

$a=1,\ b=7,\ c=8$

Then:

$x=\frac{-7\±\sqrt{7^2-4(1)(8)}}{2(1)}$

$x=\frac{-7\±\sqrt{49-32}}{2}$

$x=\frac{-7\±\sqrt{17}}{2}$

$x_1=\frac{-7+\sqrt{17}}{2}$

$x_2=\frac{-7-\sqrt{17}}{2}$

7 0

3 years ago

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What is the modulus of 2 – 3i?

Bas_tet [7]

What is the modulus of 2 – 3i?

8 0

3 years ago

An American green tree frog tadpole is about 0.00001 kilometer in length when it hatches. Write this decimal as a power of 10

galben [10]

1.e-50
you multiply .00001 by itself 10 times<span />

8 0

3 years ago

A copy machine can make 742 copies in 53 minutes. How many copies can the machine make in 1 minute?

olasank [31]

Answer:

14 copies per minute

Step-by-step explanation:

Take 742 copies and divide by 53 minutes

742/53 =14

14 copies per minute

6 0

3 years ago

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