Question

The root of the equation 7(x-1)=21 is

A) 1
B) 2
C 3
D) 4​

Answer 1

Answer:

hi friend

Step-by-step explanation:

your answer is 4

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Answer 2

First simplify it as 7x - 7 -21 = 0

so now by this formula:-

${\huge \{\boxed{\mathcal{\purple{ \frac{ { - b + - \sqrt{ {b}^{2} - 4ac } } }{2a} }}}}$

=> -(-7)±√(-7)²-4×7×-21/2 × 7

=> 7 ± √ 49 + 588 / 14

=> 7 ± √ 637 /14

=> 7 ± √25.23 / 14

hope it helps you friend!

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