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3 years ago

(9x+7)(9x-7) what's the answer

Mathematics

2 answers:

MrRa [10]3 years ago

8 0

They cancel each other out because one is + and the other is -.

EastWind [94]3 years ago

4 0

81x^2 - 49. The middle terms cancel out because of the opposing signs, but the answer is 81x^2 - 49

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Simplifying rational expressions

Sonbull [250]

1. $\frac{(c + 8)(c - 8)}{(c - 8)(c + 3)}_,_$
   $\frac{c + 8}{c + 3}_,_$

2. $\frac{n^{2} + 4n - 12}{n^{2} + 2n - 8}_,_$
   $\frac{n^{2} + 6n - 2n - 12}{n^{2} + 4n - 2n - 8}_,_$
   $\frac{n(n) + n(6) - 2(n) - 2(6)}{n(n) + n(4) - 2(n) - 2(4)}_,_$
   $\frac{n(n + 6) - 2(n + 6)}{n(n + 4) - 2(n + 4)}_,_$
   $\frac{(n - 2)(n + 6)}{(n - 2)(n + 4)}_,_$
   $\frac{n + 6}{n + 4}_,_$

3. $\frac{42x^{2}y^{3}}{28x^{3}y}_,_$
   $\frac{3y^{2}}{2x}_,_$

4. $\frac{m^{2} - 3m - 10}{m - 5}_,_$
   $\frac{m^{2} - 5m + 2m - 10}{m - 5}_,_$
   $\frac{m(m) - m(5) + 2(m) - 2(5)}{m - 5}_,_$
   $\frac{m(m - 5) + 2(m - 5)}{m - 5}_,_$
   $\frac{(m + 2)(m - 5)}{m - 5}_,_$
   $m + 2_,_$

3 0

3 years ago

What is the u known decimal equivalent for 5/100.

dexar [7]

I think that answer would be .05

7 0

3 years ago

Read 2 more answers

In ΔNOP, o = 130 cm, ∠O=61° and ∠P=40°. Find the length of n, to the nearest 10th of a centimeter.

Amiraneli [1.4K]

Answer:

145.9

Step-by-step explanation:

Gave up on delta math.

4 0

2 years ago

Read 2 more answers

Which of these might you want to find out before you read a story?

deff fn [24]

B the tessis or the hook

7 0

3 years ago

Please help me with the top one please

likoan [24]

Answer:

Ramiro is correct.

You cannot identify congruent triangles with only angles Angle-Angle-Angle is not one of the rules of congruence. They could have different sizes with the same angles which doesn't makes them congruent. They are similar though. Once you find the missing angles with the equations 62+39+C=180 and 39+79+X=180 the corresponding angles are congruent. So the triangles are not congruent, but are similar.

5 0

2 years ago