Question

2
Exercise
b. x2 + 12x + 36
d. x2
g. 8-32
a. 644 - 2562
&
C. 4x2 - 32xy + 64y?
121
e. a? - 3a - 40
f. (a - b)² - (b-c?
h. 25m?n? - 49
i. (R - 21m + m?) - ?
(x + y)² = (x - y)²
k. 81 83 - 225x5
1. 48x - 3.0
2. Factorise the following expressions by splitting the middle term.
a. x2 + 7x + 12
b. a? - a -72
C. + + 10a + 21
d. m2-3m - 10
e. 22 + 9 + 20
f. x² - 24x + 144
h. 3a + 35a - 12
3x² - 13x + 12
g. 4x2 + 12xy +9y2
1. Factorise the following by using suitable identities.​

Answer 1

Answer:

2.a. x²+7x +12.

x²+(4+3)x+12

x²+4x+3x+12

x(x+4)+3(x+4)

(x+3) (x+4)