Question

By how much does the expression 72z² - 45z + 4 exceed the expression 30z - 42z² - 17​

Answer 1

Hope you like the answer

Answer 2

Your answer is 114z²-75z+21.

Step-by-step explanation:

72z²-45z+4

30z-42z²-17 = 》 -42z²+30z-17 [Just rearranged the expression, for the ease of subtraction ]

To know how much 72z²-45z+4 exceeds the expression -42z²+30z-17 , we just have to subtract them.

72z²-45z+4 | You can also subtarct it this way :

-42z²+30z-17 - | 72z²-45z+4-(30z - 42z² - 17)

114z²-75z+21 | = 72z²-45z+4 -30z+42z²+17

| = 72z²+42z²-45z-30z+4+17

| = 114z²-75z+21

So , the expression 72z²-45z+4 exceeds the expression -42z²+30z-17 by 114z²-75z+21 .

Hope you've understood!