Your Progress - Chapter 120% complete
1Exercises6 questions
Q.1Factorise $5x+10$.v
Solution
Take out the common factor 5.
Answer:
$5(x+2)$.
Q.2Factorise $12a^2b+15ab^2$.v
Solution
The common factor is $3ab$.
Answer:
$3ab(4a+5b)$.
Q.3Factorise $x^2+7x+12$.v
Solution
Find two numbers with sum 7 and product 12: 3 and 4.
Answer:
$(x+3)(x+4)$.
Q.4Factorise $a^2-b^2$.v
Solution
Use the identity $a^2-b^2=(a-b)(a+b)$.
Answer:
$(a-b)(a+b)$.
Q.5Divide $15x^3y^2$ by $5xy$.v
Solution
Divide coefficients and subtract exponents.
Answer:
$3x^2y$.
Q.6Divide $x^2+5x+6$ by $x+2$.v
Solution
$x^2+5x+6=(x+2)(x+3)$.
Answer:
$x+3$.