book Maths Puzzle Numerical Ability

Solve equation below using the quadratic formula.
1. x2+4x+3=0

Im hoping you can help me and you know the fomula

Thank You,

Sarah

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book Other Question

Can you help me solve these three problems? Solve the linear equation by using the substitution method... 2x-y=2 and 4x+5y=5/3
Problem 2: Solve the linear equation using the addi f(x)=x^2+2

1) using the function above, prove or disprove that f is one to one by using the defination of a one to one function.

2) graph the function and determine whet