block 3

Question 1

converse of pythagoras

Answer 1

1. find c2
2. find a2 + b2
3. if the two angles are = conclude it is a right angles if the answers aren’t equal conclude it isn’t

Question 2

solving equations

Answer 2

• expand brackets
• collect like terms
• move x terms and numbers

Question 3

simultaneous equations by elimination

Answer 3

• if the signs of the variable are the same we subtract
• if the signs are different we add

Question 4

equation of a quadratic form from tp

Answer 4

• use the coordinate ti replace x and y in the equation
• solve to find k
• rewrite the equation with the k value

Question 5

quadratics in completed square form

Answer 5

• find turning point from equation
• find y intercept ( find y when x=0)
• sketch parabola labelling points

Question 6

how do you solve a quadratic equation

Answer 6

factorisé and find roots

Question 7

how do you sketch quadratics

Answer 7

• set equal to zero, factorise and solve to find roots
• find tp ( halfway between roots)
•find y intercept (x=0
• sketch parabola and label all points

Question 8

using quadratic formula

Answer 8

identify a,b and c from equation

sub in values

solve by separating formula