Determine whether the values given against each of the quadratic equation are roots of the equation. (1)r² + 4x - 5 = 0, x = 1, -1 (2) 2m² - 5m² = 0, m= 2, 5/2
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Answer:
2m
2
−5m=0
given values of m=2,
2
5
when m=2→2(2
2
)−5(2)=8−10=−2 does not satisfy the equation.
when x=
2
5
→2(
2
5
)
2
−5(
2
5
)=
2
25
−
2
25
=0 satisfies the equation.
Therefore m=
2
5
is only the root of given equation.
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