3 years ago

When your finding x in algebra how do u know the answer is infinite?

1 answer:

3 0

X is basically a variable. Now the thing is, that variables do not have a definite value, and that they can have an infinite range of values. While solving an equation in algebra, you don't know what your answer is going to be therefore, the answer could be infinite! :)

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Read 2 more answers

The difference between the solutions to the equation x2 =a is 30 what is a ?

Mademuasel [1]

Given equation is $x^2 = a$

In general solution of $x^2 = b$ is $x = + \sqrt{b}$ and $x = - \sqrt{b}$

So the solution of given equation is $x = + \sqrt{a}$ and $x = - \sqrt{a}$

Now difference between them is 30.
So we can write
$\sqrt{a} - (- \sqrt{a}) = 30$
$\sqrt{a} + \sqrt{a} = 30$
$2 \sqrt{a} = 30$
$\sqrt{a} = 15$

On squaring both side
$( \sqrt{a})^2 = (15)^2$
$a = 225$