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SashulF [63]
3 years ago
12

Can someone help me with 3 and 5

Mathematics
1 answer:
sweet [91]3 years ago
5 0
3. 9 times 4 = X times X
36= x^2
Square root of 36 is 6
6=X

5. 1(2x+1)= 1(4+1)
2x+1= 1(5)
2x+1=5


Subtract one
2x=4
Divide by 2
X=2

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Step-by-step explanation:

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Therefore, according to the given condition:

{x}^{2}  - 28 = 3x \\  {x}^{2}  - 3x - 28 = 0 \\  {x}^{2}  - 7x + 4x - 28 = 0 \\ x(x - 7) + 4(x - 7) = 0 \\ (x - 7)(x + 4) = 0 \\ x - 7 = 0 \: or \: x + 4 = 0 \\ x = 7 \: or \: x =  - 4 \\

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3 years ago
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amm1812

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