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baherus [9]
3 years ago
10

Solve with quadratic formula. 4k^2- 20 = k

Mathematics
2 answers:
zvonat [6]3 years ago
5 0

Answer: k= \frac{1+\sqrt{321} }{8} , \frac{1-\sqrt{321} }{8}

Step-by-step explanation:

Move all terms to one side.

4^{2} -20-k=0

Use the Quadratic Formula.

k=\frac{1+\sqrt{321} }{8} , k=\frac{1-\sqrt{321} }{8}

skelet666 [1.2K]3 years ago
3 0

Step-by-step explanation:

4k² - 20 = k

4k² - k - 20 = 0

By quadratic formula :

x = \displaystyle\frac{-b \pm \sqrt{b^2 - 4ac}}{2a}

x =( 1 ± √80 ) / 8

x = (1 ± 4√5)/8

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