Tyler Elliott

12/12/2023 · Junior High School

5. Express \( -2 x^{2}+6 x+8 \) in the form \( a(x-p)^{2}+4 \), and hence wite down the turning point. 6. solve for \( x \) and \( y \) if \( 2 x+3 y+1-0 \) and \( 2 x^{2}+3 x+2 y^{2}=4 \) 7. The equation of log \( y \) against \( x \) is a straight line with the gredient 2 that passes through the point \( (0,3) \). The variables \( x \) and \( y \) are related by the equation \( y=a b^{2} \), where \( a \) and \( b \). Find the values of \( a \) and \( b \).