Question

find the product by using a suitable identity (z+3)(z-7)​

Answer 1

Answer:

$(x + a)(x +b) = x2 + (a + b)x +ab$

Step-by-step explanation:

(z+3)( z-7)=z2+(3+(-7))z+3x7

=z2 -4 z - 21

z2 is actually z square

Answer 2

Answer:

This is u r answer,hope it helps you