Question

verify whether 1 is the root of the quadratic equation x2+3x-4=0
plz give me answer
I mark brainlist..​

Answer 1

${x}^{2} + 3x - 4 = 0 \\ {1}^{2} + 3 \times 1 - 4 = 0 \\ 1 + 3 - 4 = 0 \\ 4 - 4 = 0 \\ 0 = 0$

LHS=RHS

therefore 1 is the root of the given quadratic equation.