Question

check wether x = -1 , a root of a quadratic equation X² - 3x - 4 = 0​

Answer 1

Answer:

Solution



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x2+4x−x−4=0x(x+4)−1(x+4)=0(x+4)(x−1)=0 

Roots are -4 and 1.



Answer 2

Answer:

The equation actually works

Step-by-step explanation:

LHS = x² - 3x - 4

       =(-1)² -3 × (-1) - 4                         [Putting the value of x i.e. x= -1]

       =1 + 3 - 4

       =4 - 4

       =0 = 0 = RHS    

Hence, it is proved that LHS = RHS

Hope it helps you =)

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