Question

factorise(3x+4)(3x-5)​

Answer 1

Answer:

a=3x

b=4

c=-5

by applying formula

$(x +a)(x + b) = x^{2} + (a + b)x + ab$

(3x)square +{4+(-5)}3x + (4)(-5)

9x-3x-20

3x-20

Answer 2

$<font color="black">$

$\huge{\boxed{\underline{\red{Answer:-}}}}$

$\sf{\boxed{(3x+4)(3x-5)}}$

$\sf 3x(3x-5)+4(3x-5)$

$\sf 9x{}^{2}-15x+12x-20$

$\sf 9x{}^{2}-3x-20$

$\sf\huge{\boxed{\boxed{\blue{9x{}^{2}-3x-20}}}}$