Please: Use "^" to denote exponentiation: <span>2x^2 + 8x - 12 = 0
Reduce this by div. every term by 2: </span><span>x^2 + 4x - 6 = 0
Here a=1, b=4 and c = -6. Square half of b, obtaining (4/2)^2 = 4, and add, and then subtract, this 4 to x^2 + 4x - 6:
</span> x^2 + 4x +4 - 4 - 6 = 0. Rewrite the square as (x+2)^2, obtaining new equation
(x+2)^2 = 10. Take the sqrt of both sides: x+2 = plus or minus sqrt(10).
Finally, solve for x: x = -2 plus or minus sqrt(10).
Answer:
x is the missing side (x > 0)
because this is a right triangle, using Pythago theorem, we have:
x² + 4² = 12²
⇔ x² = 12² - 4²
⇔ x² = 128
=> x ≈ 11.3
Step-by-step explanation:
Answer:
What is the aswer?
Step-by-step explanation:
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