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eduard
2 years ago
10

HELP find the a,b,c of this table​

Mathematics
1 answer:
fenix001 [56]2 years ago
6 0

Answer:

<em>a = b = 1 , c = - 8</em>

Step-by-step explanation:

ax² + bx + c = y

( - 5 )² a - 5b + c = 12

<em>c = - 8</em>

3² a + 3b + c = 4

25a - 5b - 8 = 12 ⇔ 25a - 5b = 20 ⇔ 5a - b = 4 ........ <em>(1)</em>

9a + 3b - 8 = 4 ⇔ 9a + 3b = 12 ⇔ 3a + b = 4 .......... <em>(2)</em>

<em>(1)</em> + <em>(2)</em>

8a = 8 ; <em>a = 1</em>

<em>b = 1</em>

<em>y = x² + x - 8</em>

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