Cho hình hộp chữ nhật ABCD A B C D

Mathematics

1 answer:

JulijaS [17]2 years ago

6 0

Answer:

A B C D

A×B×C×D

3×3×3×6

162

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Find the area of the regular polygon

Vsevolod [243]

Answer:

433.4

Step-by-step explanation:

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kupik [55]

Answer:

$\large\boxed{f(x)=(x+1)^2-4}$

Step-by-step explanation:

$\text{The vertex form of a quadratic equation}\ f(x)=ax^2+bx+c:\\\\f(x)=a(x-h)^2+k\\\\(h,\ k)-\text{vertex}\\=====================================$

$\bold{METHOD\ 1:}\\\\\text{convert to the perfect square}\ (a+b)^2=a^2+2ab+b^2\qquad(*)\\\\f(x)=x^2+2x-3=\underbrace{x^2+2(x)(1)+1^2}_{(*)}-1^2-3\\\\f(x)=(x+1)^2-4\\==============================$

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