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natima [27]
3 years ago
11

Find the zeros of y = x + 6x- 4 by completing the square.

Mathematics
1 answer:
dsp733 years ago
8 0

Answer:

\large\boxed{x=-3\pm\sqrt{13}}

Step-by-step explanation:

(a+b)^2=a^2+2ab+b^2\qquad(*)\\\\\\x^2+6x-4=0\qquad\text{add 4 to both sides}\\\\x^2+2(x)(3)=4\qquad\text{add}\ 3^2=9\ \text{to both sides}\\\\\underbrace{x^2+2(x)(3)+3^2}_{(*)}=4+9\\\\(x+3)^2=13\Rightarrow x+3=\pm\sqrt{13}\qquad\text{subtract 3 from both sides}\\\\x=-3\pm\sqrt{13}

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7 0
3 years ago
WHOEVER ANSWERS CORRECTLY I WILL MARK BRAINLIEST!!
gizmo_the_mogwai [7]

Answer:

Area = 342cm^2, Perimeter = 22.79 cm

Step-by-step explanation:

First, divide the shape into 3:

An arc, a square, and a triangle.

Dimensions of shapes:

Arc:

Degree = 40°

Arms = 4 cm

Square:

All sides are 4 cm

Triangle:

base = 3 cm

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hypotenuse = 5 cm

To get perimeter:

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So total perimeter is 2.7925 + 4 + 8 + 8 = 22.79cm

To get area:

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3 0
3 years ago
Read 2 more answers
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Step-by-step explanation:

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3 years ago
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3 years ago
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Answer:

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  • <u>[gof](x) = 15x - 17</u> is the right answer.
7 0
2 years ago
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