Quadratic equation

  • When I solve the quadratic equation x^2+10x-1200=0 using factorization I am getting roots 30,-40 but on solving using discriminant formula I am getting discriminant method b^2-4ac= (10)^2 - 4×1×1200=-4200 I am getting negative root inside square root that means complex roots of equation x^2+10x+1200 should be there but using factorisation I am getting real roots what is this I am confused????

  • @Bhanu 852e83f3-e794-470d-bf47-27d4ad83f78a-image.png
    You missed one negative sign.

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