Question

check whether the equation is quadratic (x-2)(x+1)=(x-1)(x+3
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Answer 1

Step-by-step explanation:

let s take first LHS

(x-2)(x+1)

x(x+1)-2(x+1)

x²+x-2x-2

x²-x-2

and now

(x-1)(x+3)

x(x+3)-1(x+3)

x²+3x-x-3

x²+2x-3

they said that are equal

x²-x-2=x²+2x-3 x²is going to cut

then now,

2x+x-3+2

3x-1

hence it is not an quadratic equation....

Answer 2

Answer:

$(x - 2)(x + 1) = (x - 1)(x + 3 ) \\ x {}^{2} + x - 2x - 2 = x {}^{2} + 3x - x - 3 \\ \\ x {}^{2} - x - 2 = x {}^{2} - 2x - 3$

yes this is quadratic equations because quadratic equations is in the form of ax^2+bx+c=0

so this is quadratic equations

I hope this answer helpful for you