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Trava [24]
3 years ago
12

Factorise x^2 + x - 12

Mathematics
2 answers:
mihalych1998 [28]3 years ago
8 0
(x-3)(x+4). -3,4 multiply to -12, and add to get 1
Nat2105 [25]3 years ago
7 0

Step-by-step explanation:

<h2> x²+x-12</h2><h2> x²+4x-3x-12</h2><h2> x(x-4)-3(x-4)</h2><h2> (x-3)(x-4)</h2>

hope you undesrstood

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ziro4ka [17]

Answer:

To find the surface area of this pyramid, we must find the <u>area</u> of one <u>triangle</u> flap which we then <u>multiply by 4</u> because there are 4 of those equal triangle flaps surrounding the base(square). Once we find the area of those triangles, we then find the <u>base(square)'s area</u>. Next, we add all those areas together to get the result of the surface area.

Formula for area of triangle;

A = BH x 1/2

Where 'B' represents the base, 'H' represents the height, and 1/2 is just dividing the product of those two lengths by 2.

Plug in what you know, given that the base of one triangle is 4, and the height is 6.

A = 4(6) x 1/2

A = 24 x 1/2

A = 24/2

A = 12, the area of <em>one triangle is 12 inches</em>.

Now, we find the area of all the triangles by multiplying the area of one triangle by 4.

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4 triangles in total, so:

12(4)

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Now we find the area of the base(square) using the formula;

(vol of square formula)
A = s^{2}

Where 's' represents one side of the square which is being squared.

or

A = l · w

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Plug in what you know, given that one side of the square is 4 inches (as well as the length and width).

(I'll be using the formula s^{2})

A = s^{2}

A = 4^2 ← (The symbol ' ^ ' means raised to the power of.)

A = 16, the <u>area</u> of the <u>base(square)</u> is <u>16 inches</u>.

Now we add both areas together:-

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2 years ago
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A) 144 in

is your answer. good luck

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