3 years ago

I'd appreciate it if anyone could help ASAP. I'm giving Brainliest!

Mathematics

1 answer:

larisa86 [58]3 years ago

5 0

Answer:

Step-by-step explanation:

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Solve the equation<br>3x +5 = 20<br>Pls<br>

Tasya [4]

Answer:

Step-by-step explanation:

$3x+5=20\qquad\text{subtract 5 from both sides}\\\\3x+5-5=20-5\\\\3x=15\qquad\text{divide both sides by 3}\\\\\dfrac{3x}{3}=\dfrac{15}{3}\\\\x=5$

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3 years ago

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Determine a quadratic equation, in standard form, that has the pair of root: x=-3, x=5

Mama L [17]

Answer:

$x^2 -2x -15=0$

Step-by-step explanation:

$\text{Given that, the roots are,}~ \alpha=-3 ~ \text{and}~ \beta=5 .\\\\\text{The quadratic equation with roots}~ \alpha ~ \text{and}~ \beta ~ \text{is,}\\\\~~~~~~~~x^2 - (\alpha + \beta )x +\alpha \beta = 0\\\\\implies x^2-(-3 +5) x +(-3)(5) = 0\\\\\implies x^2 -2x -15=0$