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Maths C1 Help with questions Watch

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    Hi there if anyone could help me with these questions by explaining how to solve them then that would be great; as I cannot find anything online to help me with them, thanks.

    1) solve simultaneous equations
    y=2-x
    x^2+2xy=3

    2a) express 2x^2+8x+7 in the form A(x+B)^2+C
    2b) state min value of^
    2c) state value of x which gives the min value

    3a)5(y+5)<7-3(y+2)

    3b) x^2+4x-12>0

    Thanks in advance.
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    (Original post by DeCosta)
    Hi there if anyone could help me with these questions by explaining how to solve them then that would be great; as I cannot find anything online to help me with them, thanks.

    1) solve simultaneous equations
    y=2-x
    x^2+2xy=3

    2a) express 2x^2+8x+7 in the form A(x+B)^2+C
    2b) state min value of^
    2c) state value of x which gives the min value

    3a)5(y+5)<7-3(y+2)

    3b) x^2+4x-12>0

    Thanks in advance.

    I have attached a picture with the answers and the working out. I hope this helped.
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    rahavi9 thank you so much, if you don't mind I also have 2 other questions if you could do them as well but you don't have to lol, thank you.

    1) find values of x and y that satisfy the simultaneous eqautions
    y=2-x^2
    x+2y=1

    2a)sketch the graph of y=2x(7x-3) // indicate the values of the coordinates of the points where the curve crosses the x-axis
    2b) find the exact values of the solutions of the equation 2x(7x-3)=2x+4
    c) solve inequalties 2x(7x-3)>0 and 2x(7x-3)<2x+4
 
 
 
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