year 9 mr kidd maths

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Questions Responses

factorising

expanding

Perfect squares

Null law

100

x(x+4) -2(x+4)

(x+4)(x-2)

100

x(x+5)

x²+5x

100

expand:

(x+3)²

x²+9

100

x(x+9) = 0

x = 0

200

x²+3x+6x+18

(x+3)(x+6)

200

x(x+5) +4 (x+5)

x² + 9x + 20

200

expand:

(x-3)²

x²-6x+9

200

x²+5x = 0

x = 0 or -5

300

x²+8x-9

(x-1)(x+9)

300

(x+5)(x+3)

x²+8x+15

300

factorise

x²-9

(x-3)(x+3)

300

x²-81 = 0

x = 9

400

x²+8x+12

(x+2)(x+6)

400

(x-4)(x+3)

x² -x -12

400

Factorise:

x² - 16

(x-4)(x+4)

400

(x+2)(x+4)=0

x = -2 or -4

500

x²-4x +4

(x-2)(x-2)

(x-2)²

500

(x-4)(x-6)

x² -10x +24

500

x² - 81

(x-9)(x+9)

500

x²+10x +16

x = -2 or -8