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34 votes
34 votes
Plz I need some help with 11-12 . My teacher didn’t even explain it correctly so now I’m confused.

Plz I need some help with 11-12 . My teacher didn’t even explain it correctly so now-example-1
User Thomas Hilbert
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1 Answer

15 votes
15 votes

Answer:

Step 1: Transpose everything to one side

12. x²+16x+15-10x+4=0

Step 2: Add the like terms

x² + (16x - 10x) + 15 + 4=0

x² + 6x + 19=0

Step 3: Use the quadratic formula to get the value(s) of x.

a=1 b=6 c=19


x = \frac{ - b + - \sqrt{b {}^(2) - 4ac } {}^{} }{2a}

therefore, x=... or x

User Yamina
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