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3 years ago

Factor completely. 16-49x^2=16−49x 2 = (Can someone help me plz)

Mathematics

1 answer:

MrRa [10]3 years ago

7 0

X=0,1
Pls mark brainliest

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Solve x2 - 8x - 9 = 0. Rewrite the equation so that it is of the form x2 + bx = c.

barxatty [35]

Answer:

x=9,-1 and $x^2+(-8)x=9$

Explanation:

we have been given with the quadratic equation $x^2-8x-9$

we compare the given quadratic equation with general quadratic equation

general quadratic is $ax^2+bx+c=0$

from given quadratic equation a=1,b= -8,c= -9

substituting these values in the formula for discriminant $D=b^{2}-4ac$

$D=(-8)^2-4(1)(-9)=100$

Now, to find the value of x

Formula is $x=\frac{-b\pm\sqrt{D}}{2a}$

Now, substituting the values we will get

$x=\frac{-(-8)\pm\sqrt{100}} {2}= \frac{8\pm10}{2}=9,-1$

And rewritting the given equation by shifting 9 to right hand side of the given equation and taking minus inside the bracket so as to convert it in the form of

$x^2+bx=c$

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3 years ago

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Can somebody please help with these two questions?

Nitella [24]

Answer:

#3: x is approximately 0.37, -5.37, #4: x is approximately 4.19, -1.19

Step-by-step explanation:

You can solve using the quadratic equation or by solving with the perfect square

$\frac{-b+/-\sqrt{b^{2}-4ac} }{2a}$ = $x^{2}+5x-2=0\\ \frac{-5+/-\sqrt{5^{2}-4(1)(-2) }}{2(1)}$

x is approximately 0.37, -5.37

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3 years ago

What is 42 divided by 7

Zinaida [17]

42 divided by 7 is is 6 hope this helps

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Jefferson is plotting the vertices of an isosceles triangle on a coordinate graph. He has plotted the two points shown. Where wo

user100 [1]

Answer:

4,2

Step-by-step explanation:

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If DE + EF = DF, and ____________, then the point E is the midpoint of .

gogolik [260]

<span>DE=EF hope I helped with your studies :)

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