Ebony is solving a quadratic equation. she wants to find the value of x by taking the square root of both sides of the equation.
1 answer:
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Answer:
and
Step-by-step explanation:
A <em>second-degree equation</em> or <em>quadratic equation of a variable</em> is an equation that it has the general expression:
with
Where x is the variable, and a, b and c constants; a is the quadratic coefficient (other than 0), b the linear coefficient and c is the independent term. This polynomial can be interpreted by means of the graph of a quadratic function, that is, by a parabola. This graphical representation is useful, because the abscissas of the intersections or point of tangency of this graph, in the case of existing, with the X axis are the real roots of the equation. If the parabola does not cut the X axis the roots are complex numbers, they correspond to a negative discriminant.
Second degree equation solutions
For a quadratic equation with real or complex coefficients there are always two solutions, not necessarily different, called roots, which can be real or complex (if the coefficients are real and there are two non-real solutions, then they must be complex conjugates). General formula for obtaining roots:
The discriminant serves to analyze the nature of the roots that can be real or complex.
Δ
Solving the problem of the answer.
with a = 1, b = -13, and c = -48
Substituting the values in the general formula for a quadratic equation.
Then, we obtain the roots:
and
Solving the roots:
<u>Answer:</u>
- The solution of the expression is 19.
<u>Step-by-step explanation:</u>
<u>Given:</u>
- q = 3
- r = 10
<u>Work:</u>
- => 7 + q(r − 8)2
- => 7 + 3(10 - 8)2
- => 7 + 6(10 - 8)
- => 7 + 6(2)
- => 7 + 12
- => 19
Hence, <u>the solution of the expression is 19.</u>
Hoped this helped.