X^2 -25 =0. Factor and use the zero product property to solve.

2 answers:

7 0

X^2 - 25 is a difference of squares which has a special factorization.

In general, a^2 - b^2 = (a + b)(a - b)

x^2 - 25 = 0

(x + 5)(x - 5) = 0

x + 5 = 0 or x - 5 = 0

x = -5 or x = 5

galina1969 [7]3 years ago

7 0

Ax^2 + bx + c = 0

a = 1, b = 0, c = -25

Quadratic formula:
x = {-b +/- sqrt(b^2 - 4ac)} / 2a

x = {0 +/- sqrt(0 - 4(1)(-25))} / 2(1)

x = +/- sqrt(100) / 2

x = +/- 10/2

x = +/- 5

Factored: (x - 5)(x + 5)
Solutions: 5 and -5

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Answer:

$264\ cm^{2}$

Step-by-step explanation:

we know that

The surface area of the figure is equal to the lateral face of the triangular pyramid plus the lateral face of the rectangular prism plus the area of the base of the rectangular prism

step 1

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$LA=4(\frac{1}{2}(6)(7))=84\ cm^{2}$