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3 years ago

What are the solutions to the quadratic equation 4x2 + 28x = 0?

Mathematics

2 answers:

lisabon 2012 [21]3 years ago

7 0

Answer:

x = {-7, 0}

Step-by-step explanation:

4x^2 + 28x = 0

Divide both sides by 4

x^2 + 7x = 0

Factor out x

x(x + 7) = 0

---------------------------

From the zero product rule

x = 0

and

x + 7 = 0

subtract 7 from both sides

x = -7

x = {-7, 0}

AleksandrR [38]3 years ago

6 0

Answer:

x is 0 or -7

Step-by-step explanation:

$4x^{2} +28x=0\\4x(x} +7)=0\\4x=0 x=0\\x+7=0\\x=-7$

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2 years ago

When you are given three side lengths for a triangle, how do you know which length to substitute for a, b, or c in the Pythagore

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Answer:

When Sum of square of two Sides is equal to square of third side of triangle.

Step-by-step explanation:

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Three side length of triangle are given we need find the which value to substitute for a, b, c in Pythagoras theorem.

First we will find the squares of all length, then we will check which two square of side are equal to square of third side as per Pythagoras theorem.

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