Question

Expand the following using suitable
identities
a) (x + 13)(x +20)​

Answer 1

Answer:x^2+33x+260

Step-by-step explanation:

There is one identity

(x+a) (x+b) =x^2 +(a+b) x+ab

So we will apply this identity, here a=13 and b=20

(x+13) (x+20)

=x^2+(13+20) x+(13) (20)

=x^2+33x +260

Hope it helped u,

u try i know u can do it.

Answer 2

Answer:

( x + 13) ( x + 20)

that is ( x + a ) ( x + b)

= x²+xb+ax+ab

= x²+x(a+b)+ab

therefore,

= x² + x(13+20) + 13×20

= x² + x(33) + 260

= x² + 33x + 260: Ans

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hope it helps you

pls mark it as brainliest answer