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Vinvika [58]
3 years ago
13

Find the product. state your answer in standard form (x+7)(x squared + 6x - 8)

Mathematics
2 answers:
USPshnik [31]3 years ago
6 0

Answer:

{x}^{3}  +  13 {x}^{2}   + 34x  - 56

Step-by-step explanation:

(x + 7)( {x}^{2}  + 6x - 8) \\  = x ( {x}^{2}  + 6x - 8)  +  7( {x}^{2}  + 6x - 8)  \\  =  {x}^{3}  + 6 {x}^{2}  - 8x + 7 {x}^{2}  + 42x - 56 \\  = {x}^{3}  +  6 {x}^{2}  + 7 {x}^{2} + 42x - 8x - 56 \\  = {x}^{3}  +  13 {x}^{2}   + 34x  - 56 \\

astraxan [27]3 years ago
6 0

Answer:

x^3+13x^2-34x-56

Step-by-step explanation:

x(x^2+6x-8)+7(x^2+6x-8)

x^3+6x^2+-8x+7x^2+42-56

add or subtract like terms but before i do that i arrange them

x^3+6x^2+7x^2-8x+42x-56

x^3+13x^2-34x-56

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43.75 ft²

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s_l = (l√(w/2)² + h²) + (w√(l/2)² + h²)

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<em />s_l<em> </em>= (3.5√(3.5/2)² + 6²) + (3.5√(3.5/2)² + 6²)

<em>Step 1:Because this is a square pyramid, what you see above essentially becomes what you see below.</em>

<em />s_l = 2(3.5√(3.5/2)² + 6²)

<em>Step 2: Divide 3.5 by 2 to get 1.75.</em>

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<em>Step 3: Square both 1.75 and 6 to get 3.0625 and 36 respectively.</em>

s_l = 2(3.5√3.0625 + 36)

<em>Step 4: Add 3.0625 and 36 to get 39.0625.</em>

<em />s_l = 2(3.5√39.0625)

<em>Step 5: The square root of 39.0625 is 6.25.</em>

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<em>Step 7: Multiply 2 by 21.875 to get 43.75.</em>

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