From \(\displaystyle{a}{x}^{{{2}}}+{b}{x}+{c}\) (quadratic formula) 3 points (5,500),(3,375),(12,980)

dayncNonow04r

dayncNonow04r

Answered question

2022-03-24

From ax2+bx+c (quadratic formula) 3 points (5,500),(3,375),(12,980) I solved
25a+5b+c=500
9a+3b+c=375
144a+12b+c=980
s it possible to solve it without a calculator (for the simulateneous equations) If yes, How can I do it?

Answer & Explanation

Matronola3zw6

Matronola3zw6

Beginner2022-03-25Added 10 answers

Step 1
1) 25a+5b+c=500
2) 9a+3b+c=375
3) 144a+12b+c=980
4) (1)(2)16a+2b=125
5) (3)(1)119a+7b=480
6) 7×(4)112a+14b=875
7) 2×(5)238a+14b=960
(7)(6)126a=85a=85126
Go back to (4) to get b and then to (1) to get c.

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