3 years ago

What is the area of a rectangle with a length of 3.4 meters and a width of 1.7 meters? m2

1 answer:

6 0

5.78M^2 Length*Width=Area

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8_murik_8 [283]

$y=2x^2+8x-9\\D=b^2-4ac\\D=64-4(2)(-9)\\D=64+72 > 0$

There are 2 roots so the only way to complete the square is,

$y=2x^2+8x-9\\y=2[(x^2+4x)]-9\\y=2[(x^2+4x+4)-4]-9\\y=2[(x+2)^2-4]-9\\y=2(x+2)^2-8-9\\y=2(x+2)^2-17$

Just factor 2 out of 2x^2+8x (just ignore the -9) then find the number that will make the terms be able to complete the square.

then complete the square and multiply 2 inside the brackets.

subtraction as you already get the vertex form and know how to complete the square.

Vertex Form: $y=2(x+2)^2-17$

3 0

2 years ago

GalinKa [24]

Answer is in the attached file...

8 0

2 years ago

pychu [463]

I think it is 128 but not 100%

6 0

3 years ago

balu736 [363]

Box A has 12 balls and Box B has 8 balls.
OR
Box A has 60 balls and Box B has 40 balls.
OR
Box A has 48 balls and Box B has 32 balls.

7 0

2 years ago

Alisiya [41]

-3x-4<19
19+4=23
3x<23
÷3 ÷3
×= > 23/3 or 7.6^87

7 0

2 years ago