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2 years ago

1. 7x(9+2) = (7x) + (7x)

Mathematics

1 answer:

hram777 [196]2 years ago

5 0

Answer:

7x11=14x

77=14x

77/14=x

11/2=x

2.3x5=4x

15=4x

15/4=x

3 )35+15=

the question is wrong

Step-by-step explanation:

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The given question can be solve using quadratic formula.

The correct option is (c) $3x^2 +8x -10=-8$ .

Given:

The given equation is,

$x=\dfrac{-8\pm\sqrt{8^2-4(3)(-1)}} {2(3)}$ ---------------------------(1)

Write the general quadratic equation.

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Write the quadratic formula.

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Compare equation (1) and (2).

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Substitute the value of $a$ , $b$ and $c$ in general quadratic.

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Subtract $8$ from each side of above equation.

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Thus, the correct option is (c) $3x^2 +8x -10=-8$ .

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