Question

Factorise:

(a) 4p2+20p+25.

(b) 36x2

-81​

Answer 1

SOLUTION:

a)4p²+20p+25

(2p)²+2(2p)(5)+5²

by identity,

         a²+2ab+b²=(a+b)²

(2p)²+2(2p)(5)+5²=(2p+5)²              

⇒(2p+5)(2p+5)

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b)36x²-81

 (6x)²-9²

by identity,

   a²-b²=(a+b)(a-b)

(6x)²-9²=(6x+9)(6x-9)

⇒(6x+9)(6x-9)

HOPE IT HELPS U......

Answer 2

Answer:

1824×616+13143-1936÷4×1

Step-by-step explanation:

1×23÷81+130+143÷12-11