Subtract 9a² - 15a + 3 from unity

Solution:

We have to subtract the given expression 9a² - 15a + 3 from unity.

Required expression = 1 - (9a² - 15a + 3)

= 1 - 9a² + 15a - 3

By combining like terms,

= 1 - 3 - 9a² + 15a

By distributive property,

= (1 - 3) - 9a² + 15a

= (-2) - 9a² + 15a

= -9a² + 15a - 2

Therefore, the required expression is -9a² + 15a - 2

✦ Try This: Subtract 10a² - 5a + 23 from unity

☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 12

NCERT Exemplar Class 7 Maths Chapter 10 Problem 65

Subtract 9a² - 15a + 3 from unity

Summary:

On subtracting 9a² - 15a + 3 from unity, we get -9a² + 15a - 2

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