chapter 2 : Quadratic expression and equation

solve the following quadratic equations.




1.

(a) x(x-3) = 0

(b) (y+3)(y-1)=0

(c) (m+5)² = 0

(d) (n-2)(2n+1)=0

(e) (2p-3)(2p+7)=0

(f) (4q+5)(3q-2)=0



2.

(a) p²+7p+6=0

(b) q²-9q+18=0

(c) h²+h-30=0

(d) k²+6k-16=0

(e) a²-4a-21=0

(f) b²-8b-48=0



3.

(a) x²=4x

(b) m²-m=12

(c) k(k+1)=3(k+5)

(d) w²/4=w+3

(e) 4(7-e)=e(e-1)

(f) (p+6)²=9



4.

(a) 3r²+10r+8=0

(b) 4x²-8x-21=0

(c) 5p²-13p+6=0

(d) 8a²+18a-5=0

(e) 12h²-11h-15=0

(f) 15n²+2n-8=0



5.

(a) 10x²=9(x+1)

(b) m+5-6/m=0

(c) p²-p=p+20/6

(d) b-1/6-2b-1/5b=0

(e) (2y-3)(2y+3)=16

(f) (6k+7)(k-2)=12k