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loris [4]
3 years ago
6

Factorize a^2–b^2 Hence find the exact value of 2557^2-2547^2

Mathematics
2 answers:
motikmotik3 years ago
8 0

Answer:

51,040.

Step-by-step explanation:

a^2–b^2 = (a - b)(a + b) so

2557^2-2547^2 = (2557-2547)2557+2547)

=  10 * 5104

= 51,040.

statuscvo [17]3 years ago
4 0

Answer:51040

Step-by-step explanation:a^2-b^2=(a+b)(a-b)

2557^2-2547^2

(2557-2547)(2557+2547)

(10)(5104)

51040

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X^2+4x+4=8
-8                -8
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x^2+4x-4=0

now factor using quadratic formula
ax^2+bx+c=0

x= -b +-[ (sqrt (b^2-4ac))/2a ]

x=-2(1+sqrt(2))


x= 2(sqrt(2) -1)

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Step-by-step explanation:

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3 years ago
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Step-by-step explanation:he

The exercise is not written clearly. Assuming that it asks to find the amount of lumber (in feet) John needs for 3 shelves, let "x" represents that amount of lumber in feet.

Based on the data provided, you know that one shelf requires 8\frac{2}{3} feet of lumber.

You can convert the Mixed number to Decimal number applying these steps:

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3 years ago
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