3 years ago

Morgan is trying to complete the square. What number should she put in the blank?

Mathematics

1 answer:

marysya [2.9K]3 years ago

3 0

Answer:

C. 81

Step-by-step explanation:

x^2-18x+81

(x-9)(x-9)

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X^3 - 5x^2 - x + 5

Zolol [24]

Answer:

(x+1)(x-1)(x-5)

The roots are 1, -1, 5

Step-by-step explanation:

x³-5x²-x+5

(x³-5x²) - (x-5)

x²(x-5) - (x-5)

(x²-1)(x-5)

(x+1)(x-1)(x-5)

The roots are 1, -1, 5

6 0

3 years ago

According to the distributive property, a(5 + b) =

WINSTONCH [101]

The answer would be B

7 0

3 years ago

Read 2 more answers

Use fundamental identities to fully simply the expression.

gtnhenbr [62]

$\bf \stackrel{\textit{pythagorean identities}}{sin^2(\theta)+cos^2(\theta)=1}\qquad \qquad \stackrel{\textit{symmetry identities}}{cos(-\theta)=cos(\theta ) } \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \begin{array}{llrll} 3sin^3(t)csc(t)\qquad &+cos^2(t)&\qquad +2cos(-t)cos(t)\\\\ 3sin^3(t)\cdot \cfrac{1}{sin(t)}&&+2[cos(t)]cos(t)\\\\ 3sin^2(t)&&+2cos^2(t) \end{array} \\\\[-0.35em] ~\dotfill\\\\ 3sin^2(t)+cos^2(t)+2cos^2(t)\implies 3sin^2(t)+3cos^2(t) \\\\\\ 3[sin^2(t)+cos^2(t)]\implies 3[1]\implies 3$