factorize the following
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EXPLANATION.
Factorizes.
⇒ 4a² - 10a - 15.
As we know that,
⇒ D = Discriminant Or b² - 4ac.
⇒ D = (-10)² - 4(4)(-15).
⇒ D = 100 + 240.
⇒ D = 340.
⇒ α = - b + √D/2a.
⇒ α = -(-10) + √340/2(4).
⇒ α = 10 + √340/8.
⇒ α = 10 + 2√85/8.
⇒ α = 2(5 + √85)/8.
⇒ α = (5 + √85)/4.
⇒ β = - b - √D/2a.
⇒ β = -(-10) - √340/2(4).
⇒ β = 10 - √340/8.
⇒ β = 10 - 2√85/8.
⇒ β = 2(5 - √85)/8.
⇒ β = (5 - √85)/4.
MORE INFORMATION.
Conjugate roots.
(1) = If D < 0.
One zeroes = α + iβ.
Other roots = α - iβ.
(2) = If D > 0.
One roots = α + √β.
Other roots = α - √β.
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