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2 years ago

PLZ HELP URGENT!!! DUE TOMORROW

Mathematics

1 answer:

ladessa [460]2 years ago

5 0

Answer:

a2 + b2 + 2ab

x2 + y2 + z2 + 2xy + 2yz + 2xz

p2 + q2 + 2pq

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3 years ago

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2 years ago

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Let g(x) = – x^2 + 4x + 3. Find and simplify g(-3).

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Steps to solve:

g(x) = – x^2 + 4x + 3 when g(-3).

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2 years ago

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PLEASE HELP ME NOW URGENT

timama [110]

ANSWER

$y = 3 \pm \sqrt{21}$

EXPLANATION

The quadratic equation is:

${y}^{2} - 6y - 12 = 0$

Group variable terms:

${y}^{2} - 6y = 12$

Add the square of half, the coefficient of y to both sides.

${y}^{2} - 6y + ( - 3) ^{2} = 12 + ( - 3) ^{2}$

${y}^{2} - 6y + 9= 12 + 9$

The LHS us now a perfect square trinomial:

${(y - 3)}^{2}= 21$

Take square root:

$y - 3 = \pm \sqrt{21}$

$y = 3 \pm \sqrt{21}$

The first choice is correct.

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3 years ago

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