3 years ago

What number should be added to the expression x^2 + 2x to change it into a perfect square trinomial?

Mathematics

1 answer:

Firlakuza [10]3 years ago

8 0

The answer is (x+1)²= x²+2x+1
so x^2 + 2x must be added 1 to become x²+2x+1=<span>(x+1)²</span>

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Heidi and Andrew designed two raised flowerbeds for their garden. Heidi's flowerbed was 5 feet long by 3 feet wide, and Andrew's

d1i1m1o1n [39]

Answer:

$V=90\ ft^3$

Step-by-step explanation:

-Given the two heights are similar:

#Heidi's flowered bed dimensions and volume is calculated as:

$v=lwh$

$=5\times 3\times 2\\\\=30\ ft^3$

#The width of Andrew's is twice Heidi's. The width and volume is thus calculated as:

$w_a=2\times 3=6 \ ft\\\\V_a=lwh\\\\=5\times 6 \times 2\\\\=60\ ft^3$

#Total soil volume of the soil used is determined by summing the two different flowerbed volumes:

$V=V_h+V_a\\\\=30+60\\\\=90 \ ft^3$

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2 years ago

Question is attached, please explain a little:) will mark BRAINLIEST

Alexus [3.1K]

Answer:

Step-by-step explanation:

We know it has 2 distinct zeros. This means the discriminant of the quadratic is positive and must have 2 real zeros that can be rational or irrational. We also know the quadratic has rational coefficients which means both are either rational or irrational. They can not be one of either. Since it tells us one is rational, the other must be too.

5 0

3 years ago

Pls help me i need helpppp

TEA [102]

Answer:

{-3, -4}

Step-by-step explanation:

hope it will help you☺