Question

(1) x? - 21x +90 (x - 15)​

Answer 1

Answer:  heya there here is answer

Hi !

here is your answer

a ) x² - 21x + 90

= x² - ( 15 + 6 )x + 90

= x² - 15x - 6x + 90

= x ( x - 15 ) - 6 ( x - 15 )

= ( x - 15 ) ( x - 6 )

==================================

b ) x² - 27x + 176

= x² - ( 16 + 11 )x + 176

= x² - 16x - 11x + 176

= x ( x - 16 ) - 11 ( x - 16 )

= ( x - 16 ) ( x - 11 )

===================================

c ) x² + 19x - 150

= x² + ( 25 - 6 )x - 150

= x² + 25x - 6x - 150

= x ( x + 25 ) - 6 ( x + 25 )

= ( x + 25 ) ( x - 6 )

===================================

d ) x² - 20x - 300

= x² - ( 30 - 10 )x - 300

= x² - 30x + 10x - 300

= x ( x - 30 ) + 10 ( x - 30 )

= ( x - 30 ) ( x + 10 )

Answer 2

Step-by-step explanation:

Photosynthesis is a process by which green plant make their own food

Hope it's helpful please mark as brainliest answer